[bdcravens]

If you're willing to spend some money on plugins, you can pretty far with WP (WP-Member, Gravity Forms, etc)

Zapier makes it easy to wire together a bunch of services if you want to build up functionality fast.

Myself, I'm building my MVP's these days with Bootstrap + Rails + Heroku, and when I need to step up the design a bit, I'm leaning on WrapBoostrap and Designmodo. That said, I think it's extremely possible to build an MVP (emphasis on Minimum, as it should be) and write very little code.