Currently working on one where the seller has 3 homes to sell side-by-side - the only problem is that their are 4 siblings involved (ugh...).

Maybe but they're probably just siblings.

He has 8 children and I thought this would be a good opportunity for his oldest son to learn some skills and make some extra money (and get out of the house he shares with 7 siblings!).

It could go to your sibling without going through probate.

The other $5k is to help out my parents, parents in-law and other siblings if need to.

It turns out the house is owned by three siblings ( two sisters and a brother) all of whom are on social security.

While he may be completely truthful, you don't want to find yourself in a situation where there are dead siblings with living children of their own, or out of town heirs who need notice, etc... 

We both stand to receive fairly hefty inheritances as she is the financial POA for her 91 year old father, and co-executor of the estate with her only sibling. 

If you have a friend, or sibling (not a parent or spouse) who has any kind of sizeable cash in their IRA, they might be willing to give you a private secured loan from their IRA.

Hello, I have ran multiple businesses & have always been waiting till a good chance  to get into real estate investing. Unfortunately  my mom passed a few months & left my brother & I our childhood home we...