private loan apportunity

[Sada Rafi]

hi all, Need advice on a personal loan opportunity. A friend of mine is looking to buy a house and just recently were approved for $300k. They found a house they really want which costs $45 more. If I were to give them a personal loan how would I best construct the loan (prcentage, term, etc)? obviously, I would need an attorney to set it up. Any guidance to do this right would be great. thank you!