To qualify, you'll need a monthly Income of approximately $3800, without any other debt limiting factors.  

You have to run the numbers and evaluate the time factor as well.

If rents in the area have gone up, factoring in the condition of the unit, raise the rent. 

I am relatively new in the field but in my research and reading around due diligence saw this being noted everywhere and it made sense to me - particularly in single tenant leases which space is quite dependent on tenant factors.

(To me guy means redo everything but the some of the framing) While we paint and carpet rentals by the handful for 4K or so depending on all the other little maintenance factors.

Where does vacancy factor in? 

How much should I expect to spend, can it be factored in relation to purchase price or unit count?

What factors and metrics do you consider?

These include Owners with Low Financial Stability Scores (FSS) and Seniors with Long-Time Ownership.Both lists can be mixed with Absentee Owners if you don't want to put all your faith in owner occupied - and can be customized with property type and home value along with other limiting factors

I ask my lender.. why can't the underwriter removes those debts to not factor in my debt to income....