Investor and spec home builder Partnership Structure?

[Wyatt Johnson]

So I recently moved back home to start building a spec home on one of my 3 lots. My partner is my builder and I wanted advice on how to structure our splits and such. The only problem is that I had to open a bunch of accounts to help him start up. Also we agreed to split the house 50/50 but he also wants $3500 a month for a max of 4 months so $14000 total. I planned on continuing the partnership, but he is building a custom home on the side using my accounts to charge to. He pays them off with the custom home owners construction loan.  He hasn't told me about me seeing any money from that and I don't know if I should.

Bottom line, I just threw out everything that is going on with my build and am searching for advice about all of it.