Would like some advise here I’m under contract for a quadraplex, during the inspection period I had a property inspector find a few issues, damage to the ceiling from a prior leak , safety issue with the stability of a staircase , and mold in the laundry area.

one thing you can do is simply don't buy homes with basements.. older homes basements will always leak will always have some cracking etc.. 

I purchased the docs that were recorded with the State, but we cannot find any indication of what the principal was at the time, and it won't even tell us the new loan number that Nation Star assigned to the loan.

Fannie Mae isn't super specific on this:https://www.fanniemae.com/content/guide/selling/b3/3.1/09.html#Notes.20Receivable.20IncomeHow this would play out:So this would be one where I collect all your docs and send it out to 3 or 5 really liberal lenders.

If there is a window seal leak and water has leaked in the rental property can tenant hold landlord liable for any damage to furniture? 

2) For loan docs, what are you guys using out there ?

But my guess is it the agreements you receive will be boilerplate docs pulled out of a file cabinet. 

Of those that do, you're paying for it.In any case, FHA 203ks are eligible for a streamline (no income docs, no appraisal) refinance into a vanilla FHA loan after you make your sixth payment.

Another water line is another chance for a leak.

You want someone who not only can close the sale transaction, but who can advise you on the exact language you'll need in your docs should you have to foreclose.