I was never saying making anything with any technology is easy.
Developing with plain Rails and a minimum of gems is linearly difficult while developing with a set of DSL/generators like Avo can lead to a complexity spike from 1 to 11 in no time. And the worst thing — at a random stage of development.
From the business perspective of view, I really like it: it's a perfect example of a micro-project and I wish you the most of luck.