The salesman assures me that the vents are for air intake only and the unit can go flush - that if I open up the wall there will be sufficient air intake from the air between the studs - but of course he'd say that; he's trying to sell me the unit.Comments?

I will require the tenant to provide proof of sufficient liability coverage and whatever else their licensing division requires.  

Now that I've come up for air I figured it would be a good time to introduce myself and begin networking in order to take advantage of the other valuable resource BiggerPockets has to offer, the vast community full of like minded individuals with diverse skills, experience, and expertise.A little about myself...

(Your offers will obviously include sufficient margins of safety.) 

Would that be sufficient?

I found a good realtor but I want to be as self-sufficient as I can manage.

If my numbers from the post above are correct, would that be sufficient evidence to bring to the table?

The vast majority of people here are residential only, so its nice to hear from the commercial side of things. 

I have a contract on a parcel of land in a vastly developing community in South Philly.

Ryan - here's my thoughts in why your not getting the help you want:1) Your question is not sufficiently framed to understand.