A fourth bedroom and or and Office den would be a bonus but not a necessity.  good schools strongly preferred, at least elementary.

So you get cash flow while you own the property and a bonus when you sell from the property appreciation.

As a bonus, offer the owner a certain amount of cash (i.e 5, 10, or 20K).  

See what it would take to make into a bedroom or just a bonus room they can use as an office or home gym on their own accord is probably a good way to advertise it

Bonus for you: Rent is taxed at a lower rate than is property management income if you were to act in that capacity. 

Follow up questions (for bonus points)...What does that relationship look like? 

And then the later payments are bonus profit.

Do i just eat the additional $1600 (1 month of tenant B's rent), let him stay there and hope because i was generous he wont cause 10's of thousands of dollars in damages. i feel i have bent over backwards by not evicting him in February, working with him in the monetary part, allowing him to get away with everything so far, that the possibility if i continue try and keep him happy, that it will all be for not and he will continue to take advantage, not vacate the property at the end of the lease, and cause further damages.

I'm with Tim that the assumed numbers are very generous.

30% Operating expenses seems generous to me, as most commercial agents have told me that these could be brought down to about 27% of gross rents.