Yes, rails is great, but would love more of the direction of a single page app. VulcanJS is closest but like I said not sure if its' still that active.
https://hofstadter.io (checkout the docs)
1. Theming/Components so I can make it look good enough that alpha testers don't immediately write it off (A decent looking material design theme with customizable colors would be fine).
2. The pricing model is a non-starter with the current project, which requires us to create dozens of MVPs a year, and move forward with the ones that resonate with customers