At the time it seemed that most of the people buying these types of homes were about 50% of people who were a hot water tank away from giving them back to the back.  

Is the water heater a tank or tankless?

Does it have a septic field and septic tank or is it connected to the city waste disposal system?

Find out the life expectancy of a hot water tank, then bill the tenant the difference.

Just your basic 20% down get a loan, etc.I know there are 84 other variables that come into play in making the decision.Does the think tank here have any general pieces of advice?

I said put it back to Auto, she said ithe furnace wont work if she do that :)) I came over and it was 70 degreee inside the house but she had her blanket cover her head but her kids was on their tank top and short.... i just need to light up the pilot.

It seems like this is highly shark-infested waters, with lots of scams and scammers, and the actual information is difficult to obtain...

Tanks Trent!

I think I saw a big oxygen tank in the garage. 

I would recommend you get way into the weeds on your due dilligence- septics, roofs, subfloors, hot water tanks, drainfields, etc.