I am going to be very aggressive on pricing and not wait for the homes to be listed months and months then start lowering the prices. 

Either lower your expectations, or keep the same inputs.

Likely will have a value lower than if it were 4 units (but higher rent than 4 units). good luck 

Plenty of markets with a lower entry point where the numbers work.

You do not get hit twice for example of loan payments that are already accounted for on the business side but if that loan causes the business  to be unprofitable your DTI still will be lower because of it.

I've told him no multiple times, that I'm firm on the agreed upon price since he had time ample time for due diligence and if he wants lower, then I want to void the cancel the sales agreement so that I can put it back on market. 

I target small and midsize companies who care more about cost than larger companies because they may be more willing to work with another housing supplier if they're able to offer lower rates. 

Ideally, I feel like the space is worth 3400 a month but I have significantly lowered the rate because I wasn't getting ANY bookings :( I've posted listings on furnished finder, airbnb, zillow, and vrbo.

Most of the 15-35% should be added to your reserves which is 75% of capex costs(you just fixed up so lower end), 2 tenant turns, 8 months vacanies, and 4 months lead time.

The better your credit, the more likely you'll be able to access a lower down payment option.3.