a rental property management and billing system
PROJECT OVERVIEW
What this app does
A rental property management system for 100 landlords and 1,000 tenants. Landlords can manage properties, rental units, leases, and tenant bills, while tenants can review their rental details, view charges, make payments, and access payment history.
As a landlord, I can create and update rental properties and units so that I can maintain my portfolio
As a landlord, I can create and close tenant leases so that unit occupancy remains current
As a landlord, I can issue a bill against an active lease so that a tenant knows what is due
As a landlord, I can review bills and their payment status so that I can monitor collections
As a tenant, I can view my current rental and lease information so that I can confirm my tenancy
As a tenant, I can view outstanding rental bills and pay one online so that I can settle charges
As a tenant, I can review my payment history so that I can confirm prior payments
The following user counts are projected totals after one year of growth
1000
tenants
Registered renters who review their lease context, receive bills, and make payments.
100
landlords
Registered property owners who maintain rental inventory, leases, bills, and payment status.
COST BREAKDOWN
How your requirements become a plan and a price
Momen doesn't give a vague quote: it first sizes the project's actual demand for each capability and resource, then costs each item out. The numbers in the 'Project demand' column below — their scale assumptions and derivations — are detailed in Scale & sizing
Minimum viable plan
PRO
Online rental bill payments require PRO.
See the capability-by-capability assessment ▾
PROJECT DEMAND
ALLOWANCE PROVIDED (COMPOSITION)
AI points add-on
x 0
0 points
not purchased
(plan/kit 5.0M points)
No requirement
$ 0
Outbound data transfer add-on
x 0
0 B/mo
not purchased
(plan/kit 10.00 GB/mo)
No requirement
$ 0
Object storage
add-on
x 0
0 B
not purchased
(plan/kit 10.00 GB)
No requirement
$ 0
Database storage add-on
x 0
73.20 MB
not purchased
(plan/kit 1.00 GB)
Covered by plan/kit (margin ~1266%)
$ 0
single-tenant kit
x 0
1 req/s
not purchased
(plan/kit 25 req/s)
Covered by plan/kit (margin ~2400%)
$ 0
PRO
x 1
Pro is the minimum viable plan
Pro
(Plan tier: PRO)
See minimum viable plan above
$ 99
plan + add-ons · usage-based · no development cost
WHY MOMEN
Your options for this project
In the table below, the 'monthly infrastructure' for the self-built / AI routes is derived from the AWS list prices shown below, sized against this project's actual usage. Figures cover infrastructure and operations only — AI usage is billed separately and excluded here, so they don't match the $99/mo all-in above.
Current usage sizing
AWS list pricing
0.00 GB (first 100GB free)
Internet egress → 0
0.00 GB-month
S3 Standard → 0
0.07 GB-month
RDS gp3 storage → 0.01
2 × db.m6g.large (Multi-AZ) × 730h
RDS PostgreSQL db.m6g.large → 232.14
2 × t4g.large × 730h
EC2 t4g.large → 98.11
Total ≈ $330.26 / mo
Pure cloud resources
DEVELOPMENT COST
MONTHLY CLOUD INFRA ($/MO)
MONTHLY TOTAL (INFRA + OPS, EXCL. AI USAGE)
Traditional outsourcing / build in-house
about $85,000 - $130,000
≈ $330
Based on the AWS estimate above
≈ $2,330
Infra $330 + ops ~$2,000
4-6 months
5 / 5
Vibe Coding
about $14,000 - $22,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
hours
5 / 5
AI full-stack generation
about $6,000 - $9,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
hours
3 / 5
Off-the-shelf SaaS / vertical solution
$0
N/A
Priced per seat, not by cloud infra
≈ $16,000+
Per-seat pricing, tens of thousands of users
days
1 / 5
Momen
Recommended
$0
$99
All-in: egress / storage / auto-scaling; excludes AI usage
$99
hours
5 / 5
Servers, databases, traffic and storage are inherent infrastructure costs for this project — you pay them whether you outsource, use Cursor or Lovable, or build it yourself (self-built runs ≈ $330.26/mo at AWS list prices, often more), on top of the dev and ops staff you'd need to hire. Momen bundles all of it into $0/mo all-in and removes the need for an ops team.
The frontend can be generated with AI tools (Cursor, Lovable, etc.); the hard part is the backend — auth, database, scaling, data security and ops. Momen delivers a production-grade backend as a BaaS: keep the vibe-coding speed on the frontend, while the backend runs on proven infrastructure — reliable, with no self-hosting or ops.
SCALE & SIZING
What scale this estimate assumes, and how the numbers are derived
Cost depends heavily on usage volume. First see the key assumptions and business scenarios this estimate uses, then the full calculation derived from each scenario for every resource — all adjustable to your real situation
We assume 1,100 registered accounts because the project explicitly specifies 100 landlords and 1,000 tenants, and no additional staff or public-user accounts are stated. Anonymous visitors are excluded because this is a private rental management system. If your actual business operations include property managers, accountants, or support staff, this parameter can be adjusted accordingly.
We assume a standard linear-growth software rollout because a rental management system normally adds landlords, tenants, leases, and billing history gradually rather than launching with a full pre-existing dataset. The equivalent accumulation period is therefore set to 225 days. If your actual rollout differs, such as a brownfield launch with all historical records loaded immediately, this parameter can be adjusted accordingly.
Monthly Payment Rush
Monthly Payment Rush
1
times/month
0.38 req/s
Peak load
We assume the main payment peak occupies a two-hour window once per month because a common rent due date concentrates tenant visits without forcing every tenant to act within the same minute. This scenario is isolated from routine portal use because hosted checkout has a substantially different request and write pattern from casual account review. If your billing calendar has several due dates or a sharper deadline-driven rush, the frequency and duration can be adjusted accordingly.
Main impact: Peak Concurrency
The scenarios above set the assumptions for each resource; below is the full calculation derived from them. Click to expand each item.
DEVELOPMENT SCOPE
How this app works
What exactly does this budget support? Broken down by business scenario, showing the pages, data tables, automation flows and AI assistant behind each one
A tenant reviews prior payment attempts and confirmed payments.
Landlord Portfolio Page
users
A tenant checks current rental information, reviews outstanding bills, and starts payment for one bill.
Landlord Portfolio Page
users
activate_lease
A landlord reviews billing records, issues a charge, and checks its payment attempts.
Landlord Portfolio Page
users
A landlord reviews lease records, activates a new lease, or closes an existing lease.
Landlord Portfolio Page
users
activate_lease
A landlord reviews the portfolio and creates or edits a property and its units.
Landlord Portfolio Page
users
page
data_table
action_flow
Payment History Page
Lists a tenant's previous payment attempts and successful payments.
Tenant Billing Page
Shows a tenant's current rental, bills, and online payment entry point.
Landlord Billing Page
Allows landlords to issue rental bills and monitor their payment status.
Lease Management Page
Lists leases and supports tenant placement and lease closure.
Property Detail Page
Shows a property's rental units and provides unit creation and editing.
Landlord Portfolio Page
Lists a landlord's properties and provides property creation and editing.
FAQ
What you might want to know about this project
The Q&A below is generated by AI based on this project's type, features and scale
Does this estimate include property photos or lease documents?
What billing scope is included?
What most affects resource usage for this rental system?
Copy to discuss with AI
Challenge & re-estimate
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