Build an MVP web application on Bubble (no-code) for a startup

We're an early-stage startup and need to quickly validate our product idea before assembling a full development team. The plan is to build a working MVP as a web application on Bubble (no-code) so that in just a few weeks we can show real, usable products to our first customers and learn from actual user behavior instead of guesses. The application must support registration and login, personal accounts with role separation, a carefully designed database that reliably stores users and their records, and the core scenarios that will drive product use from day one. We don't need a throwaway prototype: it's important that the application is clean enough to demo to investors and stable enough to onboard the first group of paying users.

The scope includes a well-thought-out data model, core user flows implemented end-to-end, a dashboard showing key metrics at a glance, and a working payment integration so revenue can actually be collected within the product. We expect responsive design that works correctly on desktop and mobile browsers, reasonable form validation, and basic access control so users only see their own data. Please lay in Bubble data types and privacy rules from the start because redoing them later is painful. During the work we want short regular calls and a preview link to give feedback during the process, not just at the end.

In your response tell us about similar Bubble applications you've launched, your approach to database and workflow structure, and a realistic timeline breakdown within budget. We value clear communication and a contractor willing to suggest a better solution if our requirements are not precisely stated.

— Accounts: registration, login, password reset, roles
— Database: clean data types with privacy rules and validation
— Key scenarios implemented end-to-end
— Dashboard with key metrics and lists
— Payment integration tied to real checkout
— Responsive layout for desktop and mobile plus notes on project handoff