All in on AWS for BE. Just about everything you need is there for free or close to free. Netlify for FE hosting just because it’s so easy to tie up to Github. Retool for ops. Metabase for BI. Seed for Serverless CI/CD.
What backend are you using for Metabase? Any chance you are using the same backend for Retool? I'm thinking about doing this with Snowflake as a backend.