Ask how many units they manage and how much experience they have.

I dont know how many units you are talking about, my biggest problem was tenants having easy access to me.I finally decided to use a software and got an internal property manager so moved away from it.Currently setting up the maintenance request portion of it, so will see how it goes.

There are other factors that determine what they will pay for your unit and the family who applies. 

A true Portfolio program offers a 15% Down for any SFR or up to a 2-4 Unit Multifamily but requires proof of some sort of income.

The current owner rents for 650 per unit and is happy.

(Tedious process)Unlike my other properties, where most applicants meet the criteria and need to see the unit to decide if they like it, this particular unit appeals to almost everyone (In this demographic)—but many fail to meet the qualification requirements.

He's retired at 35 and all he does his run his units. 

Still, we are looking for more granular data that breaks down by unit configuration closer match to the minimums set for each military, rank) plus estimates for the costs of utilities. 

Are you targeting a certain number of bedooms/unit (this is how S8 generally calcs the rent for each unit)?

You can also try to flip smaller unit like maybe a condo or a mobile home where you also own the land.