If the repairs are not sound I'd get an estimate to fix it and request a price reduction.I may also decide to do nothing- If I find evidence that the modifications were done using permits and passed the city inspection & maybe even obtained occupancy certificates then I would just close on the deal. 

Since my grandpa's wife is passed already, he has full control of the property, but if he were to sell the house, he would have to pay his wife's family a percentage of the sale, but he doesn't want to do, he would rather take out some type of loan (what loan is best in this situation?)

California does not recognize series LLCs.You also want to look at whether a pass-through entity helps your bottom line and your taxes.

I do ask that you actually get to know me before passing judgment. 

Does anyone know how I would be able to find an address of someone who recently passed away other than driving to city hall and going to public records?

Allowing ninety days to pass without clear oversight is a disaster.Where do you live?

.* If you fall behind with your repayments we may pass information about the amount you owe to a credit reference agency.

It found the five most landlord-friendly states to be:West VirginiaArkansasLouisianaNorth CarolinaAlabamaAnd, our governor just passed some serious anti-squatting legislation. 

If it is your child, it may be good for them to learn but also may be a burden as they try to pass school. 

Texas recently passed state laws regarding those - and if you don't do it right, you lose the house and the debt entirely.