@Eric Ingersoll, While your running those numbers I wanted to piggy back on something @Bill S. said.  

They will run 20+ years while a standard tank unit is 10-15.

One house was listed at $179k, the price dropped and after I produced a $30k issue I was able to get it for $110k.One house they had a current appraisal (I didn't agree with it) at $160k and I offered $91,500.The only other low offer was one they listed at $115k, I offered in the $40ks and have since bumped up to $60k but they sold it elsewhere (sounds like it went for around $70k).You run a risk of looking like what you fear, but what could it possibly hurt to try?

I have 2 potential properties in this region and I need assistance with running comps and getting information on the market.

It was a part time thing for them as they run a business as well, almost 6 months of that time they were held up with some planning issues, it takes a little longer to get approved over there and they were denied for the initial planning. so the place sat for a while with no work being done!

The fact that they so quickly were willing to give you $8,000 in repair credit tells me theyre scared youll run.

I have run the numbers and the property will cash flow very well after rehab using conservative numbers.

If someone tells you they have not, run. 

I understood mine was a small project and figured bigger more lucrative projects were bumping me to the bottom of the pile.Around April I started running out of patience.

It's the struggle between being a caring, compassionate human being and running a business.