Budget

Include estimated costs even when a service is covered by a free tier or credits.

Item or service	Purpose	Estimated cost	Free tier or credits	Actual cost
Hosting - web app	Frontend and API	$60	Free tier sleeps when idle
Firebase Storage	Archived GTFS datasets (~50 GB) and simulation run outputs	$10	5 GB free, then pay as you go
Firestore	Accounts, saved scenarios, archive file metadata	$0	1 GB + 50k reads/day free
Firebase Auth	Google and GitHub sign-in	$0	Free at our scale
Domain name	Public build URL	$15	None
GitHub	Repo, Actions, Projects	$0	Free for public repos
Field measurement supplies	Data Collection	$20	None
Total	-------------	$105	--------

Cost Management

The costs listed above are estimates based on the current project requirements and expected usage. Actual expenses will be tracked throughout development. If project requirements or resources needs change, the estimated budget will be reviewed and updated accordingly.