Great insight into the tech stack for startups. It's an age-old problem for startups to decide on a tech stack that they can carry forward in the long run. The startup need not build for 5-10 years down the road but for the first 3 years. SaaS or no-SaaS, use a combi of Low-Code with Full-Stack single-language frameworks (JS/TS).

T3 is a great single language Fullstack stack to begin with https://create.t3.gg

And for a low-code AI generated, https://retool.com/

For sample template generation, use https://v0.dev/

Depending on the breadth and depth of the product, plan for right sizing with 1+ Solution Architect (contractual), 2+ Fullstack Devs (1 permanent), 6 mo (deadline) for MVP.