How many parties can finance one flip?

[Gail Greenberg]

There are two of us doing a flip. We have a hard money loan and want to go through with it to build our relationship with the lender. A private lender just popped up and wants to get in on the deal too. I had planned to put some money in as well. Is there any way to have 3 funding sources in one deal? A first, second and third mortgage?  Does this trigger any SEC problems?  The flip is in PA and the private lender is from CA.  Is that a problem?  What kind of contracts would I use to put this all together?  Thanks!