[staunch]

Do a trial project (but don't call it that). Say a two or three month project for $N. Tell him that's the only project you plan to do with him.

Assume you will get nothing usable in return. Write off the money as a loss. If you're pleasantly surprised with the results then do a bigger/real project with him. If not then at least there are no messy endings and hurt feelings.

[anarcticpuffin]

I like the idea of that. This way I can make sure he's capable of focus and delivery.