@Ian Cooperman Looking at these numbers it seems as though this could definitely work. How negotiable is the seller? When negotiating I would recommend anchoring the seller at a reasonably conservative ARV and negotiate it down from there. This will help you be able to get closer to the number that you want. I would also walk the seller through each option they have so that you aren't pressuring them into your "low" offer. I would ask them questions such as "why don't you list it with a realtor?" "Why not fix this up yourself?" "Why not put a little work into it and rent it out?" and lastly "why not keep the property?". This will help the seller feel as though he is almost trying to sell YOU the property since he doesn't want to use any of those options and hopefully help you guys come to a better agreement on price.
And in the cases that they do pick the other options well then you truly were able to do what was best for the seller and help them out in their situation. Hope this helps!