We're in a similar space and more companies like yours need to exist.
I'm one of the cofounders at https://turtle.ai/
Our average paid out hourly rates have been lower than yours, but we make it REALLY easy for both sides to work together. We've built our own task manager and chat app that makes customer and freelancer lives easier.
We have a lot of PhD students and full time developers doing 5-15 hours per week on Turtle.
Good luck and we'll be looking out for you! More "alternative work" options need to exist. The 40-hour, butt-in-seat life needs to go (or other options have to at least exist).