Two more questions;1) One (1) air handler per unit?

Adding 50% more square footage also brings in issues of larger or second air conditioning needed, larger water heater, etc.

Is the ventilation fan drawing out enough air and moisture?

Here's what it says (you can research the other 49 states if you wish):''Real estate broker'', hereinafter referred to as broker, any person who for another person and for a fee, commission or other valuable consideration, or with the intention or in the expectation or upon the promise of receiving or collecting a fee, commission or other valuable consideration, does any of the following:sells, exchanges, purchases, rents or leases, or negotiates, or offers, attempts or agrees to negotiate the sale, exchange, purchase, rental or leasing of any real estate, or lists or offers, attempts or agrees to list any real estate, or buys or offers to buy, sells or offers to sell or otherwise deals in options on real estate, or advertises or holds himself out as engaged in the business of selling, exchanging, purchasing, renting or leasing real estate, or assists or directs in the procuring of prospects or the negotiation or completion of any agreement or transaction which results or is intended to result in the sale, exchange, purchase, leasing or renting of any real estate.That's air tight.The only legal way to wholesale is in MA to double-close. 

Lets clear the air.

It is fine if he doesn't qualify  under your standards, but just have him on the lease so if they are evicted ect he is also held responsible3) For the air filters, a company I used to work for would hold tenants responsible for this.

Other than the obvious, heat and air, plumbing, electrical, roof , etc and the rental history. 

Our feeling is that either they know each other well enough to share a bed, or they don't and will either increase the bed requirements of the listing, or will bring an air mattress.  

It varies by asset type, air rights, density zoning laws, and parking ratios required.Some developers are ultra conservative with size of building and still see if numbers work.

I am in the Air Force and plan to start my real estate business ASAP through wholesaling and eventually conducting fix and flips and  then add more properties to my rental portfolio.