I have heard talks of using "estoppel agreements" when taking over apartments to ensure that everyone is on the same page.

@Christopher Phillips The roofer also mentioned that the shingles were fairly new but there was at least 2 layers of shingles on the roof causing the layers to retain water hence why when I walked on it I could see  water coming up in some areas.I plan to get a more estimates to ensure I am getting the most accurate information and reasonably price on the job.

I always ask for 30 year loans and usually get offered 10-20 year amort, but we all know that we are going to refinance in a few years anyway, so I always ensure there are no prepayment penalties (learned this one the hard way).Hope my thoughts help you get the juices flowing.

It's supposed to ensure there are no surprises after closing.

Jason and Joel: So I have already broached the topic with the owner, no numbers or anything just that If he is willing to do seller financing we could ensure he has long term retirement income.

Work in areas you know and personally ensure there is plenty of profit for the borrower.

Whenever you are buying a property out of state you should do a few things to ensure it's as smooth as possible.

Am I going to ensure they represent those clients? 

Prepare the sub floor, float low spots, sand down high spots, take your time with the install, verify edges aren't damaged, maintain a clean working area, inspect and clean the channels before installing each plank, ensure a complete lock and verify seams are running square/even.

Until you have completed them a few times you will want to deliver these in person so they can look it over to ensure you don't have any errors or omissions.