Subordinate Lot to Contractor - Deal Structure?

[Alex Brandt]

I bought two lots via cash in 2016, the one lot I built my primary home on financing the construction loan and hiring a contractor. 

Now I have the second lot and trying to determine what I can do with it. 

I recently learned about subordination, in that I can have a contractor use the equity in my lot to help secure financing on a construction loan. I would then place a lien on the property for the value of the lot. 

I would normally try and finance the construction loan myself, but my DTI is at 43% between my primary home and my investment property.

But besides the value of the lot I'd get back when the home is sold, I would like to get some of, if not all of the proceeds from the sale (after build costs, etc).

How would I structure this deal to have that outcome? 

I already have a plan/design in mind and would like to have some say in features/finishes.

Are contactors willing to have this kind of arrangement? 

Anyone with experience or suggestions would be greatly appreciated.