He has also offered to help mentor me in running the property if I go with seller financing since he doesn't want the place back in foreclosure.Based on my assumptions (and I had to make a lot): Actual CapRate - 5.36%CoCROI - 3.66% (not including coin operated laundry)Gross Income - $11,475, (15 Units, Rented at $850 each, 10% vacancy)Monthly Operating Expenses - ~$6k (Repairs, Prop Mgmt, Taxes, Insurance [No clue what to put here estimated $416/month?]

@Robert Barnett Initially, it's a business contribution (followed by distributions when you need the coin).  

I'm aware of coin operated laundry, paid parking, furniture rentals. 

I'm a serial entrepreneur with a history of successes in everything from demolition and hazardous materials contracting to HazMat consulting, heavy construction, precious metals and rare coins, even healthcare! 

Since it can be assumed he is over lower analytical ability its likely that the mom and pop got him cheaper than they could have if they had him on salary.Thats just one side of the coin, in addition i presume a guy with 50 properties that are his bread and butter is very familair with each property and each tenant as opposed to a property manager with 450 rentals in his region.This is one business that economies of scale begin quickly and taper off just as quickly when volume picks up.

Ron has a point but you have to consider both sides of the coin.

Many times the broker/agent doesn't want the job but does it out of necessity to make coin to scrape by.

I work for a property mgmt co in CA and 30-days vacant would be too long. 

I have read online in other forums where people were using Credit Cards to purchase $1 coins from the Mint.  

Keep working to find a fix(maybe another coin slide variety will fit?)