Flipping: Profit share btwn Financer and Contractor

[Dan B.]

I have a very qualified contractor who I trust who I'd like to go in with on a Flip.  He's also very expensive (very good work, on time).  I would be providing financing and finding the deal.

How can I structure the deal so that the contractor is incentivized to keep his cost down?

I'll keep this vague because I'm open to many possibilities.

Thanks