Sounds cool, I'd gladly do something like that if they were paying me. I think a good solution is to define a well-scoped project and bring candidates on board

Sounds cool, I'd gladly do something like that if they were paying me. I think a good solution is to define a well-scoped project and bring candidates on board on a contract basis to implement them. This contract basis project can even be done remotely. This offers the candidate a chance to learn about you, you can learn about the candidate, and in the end you can both decide what is best for you.