I was in your shoes once as well.I created digital meetup on BP for investors who couldn't attend meetup's. 

Photocopying currency as a receipt matter is a violation of counterfeiting laws under Treasury regulations, only law enforcement and government agencies in special situations may photocopy currency.

Personally, if I were in your shoes, I'd first install a privacy fence dividing the two, if they can't see  your tenants, it should provide a needed barrier for both.   

If I were in your shoes, I would be looking to offload this property as soon as possible and be asking everyone involved to make you whole. 

The Pa Sales tax is 6% for most counties but exempts food, clothles, shoes and some other items. 

I was in your shoes not too long ago.You've reached a road sign that says "Road Closed", it's time to get creative.

In my shoes, how would you do this without scaring the motivated seller away because of suspect.

Looking at this from the bank's shoes, someone called and told them: "Hey you screwed up by securing a loan without doing your job".

The older I get the more I need house shoes.

@Philip Pape If he is providing all of the money, coordinating the rehab, and bringing all of the experience I think you should pretty much be OK with whatever structure he wants to go with and use it as a valuable learning experience.At minimum If I were in his shoes I would want you to be a personal guarantor on the refi side, deal with the back end selling of the property, and to deal with all of the day to day maintenance once stabilized to even think about giving you 50% of the deal.