Ask HN: How would you build and host a CRUD app for a small charity org?

Hi HNers, I'm doing some volunteering for a charity org right now, and the problem I've been asked to solve is that their current system of registering users on their service is all paper based. This is obviously making it really hard to stay on top of what data they have (they operate over multiple locations) and to stay compliant with all the relevant regulations (ie. GDPR).

So they need a simple CRUD app that their charity organizers can log into and submit details of the people who use their service. They also need to keep records of which people have attended sessions that they run.

My first thought of how to build this would be to start them an AWS account and use RDS to store the data, and then write a simple API app to perform CRUD operations on it which would run on Fargate, then serve up a static front end to call the API.

I was wondering if anyone has any better ideas that I might have missed? I'm used to working full time for large tech companies where hosting and maintenance are just a normal part of life, so I'm aware I might have a blinkered view of how to go about this. They're a charity with no full time tech staff so maintenance needs to be minimal, and the cheaper the hosting costs the better for obvious reasons.