This is a fantastic opportunity for someone to build a marketplace that connects folks who need a quick MVP built with freelance developers. You could go a step further and break it down by back-end, front-end, design only, or all of the above (because maybe you already fill one of those roles yourself).

You can bake in the idea of a cash/equity split if the freelancer was interested as well.

The idea would be to limit projects based on time, scope, or budget from the get-go and stick to the MVP market niche.

Edit: Thinking about this idea more and reading more comments on this thread gave me another idea. Many people have commented that it might be a good idea to have your app fully wire-framed and thought out first. Need help with this specific stage before getting into the development of the MVP? Just another channel on the marketplace.

Idea Consulting -> Wire-frames -> MVP Development -> Design

All of course are optional and you could obviously swap Development and Design.