Fix and flip partnership advice needed

[Lou Palazzo]

Hi, All

I'm looking at a double wide trailer on .8 acres of land.

My contractor would like to partner with me on this. He has agreed to put it on a foundation, fix the roof, construct a garage and whatever else needs to be done at cost and delay his pay until the property is sold. He has also agreed to front 1/2 the purchase price.

My questions: How should I structure this? Is there an existing contract I can use? How should we split the proceeds or the loss?