Not only does the second bathroom add value- it's likely to significantly decrease your vacancy.

But either way they will 75% of your rents to account for vacancies, etc.Now how does the property look with regards to dti?

Regarding vacancy, I've had my fourplex in the same area for a few years now and I haven't had a vacancy longer than 1 month, but who knows with this pandemic.

For example, if the debt service on a big loan is $1,750/month and the rent on that building is $2,500/month and the area sees a low vacancy rate at this price-point of rent then you'll probably see that the rent fully covers the debt and the lender doesn't mind much because of that.  

I'm setting aside 40% of the rent income for maintenance, capital expenditures, vacancy, and other expenses.

By "numbers" I mean population, population growth, income growth, job growth, job diversity, lower crime, lower vacancy., etc.

Account for not just the obvious costs (PITI), but the less obvious (CAPEX, Repairs, Vacancy, Management, etc.) 

The price of SFH's is not controllable, so I use that variable to estimate the possible severity and length of downturn.Also, I'm not a SFH speculator, I'm a multi-family guy, but I pay attention to this because it's a barometer of rent potential and vacancies, and my calculations and data regarding this are proprietary. 

Considering vacancy, applying 25% off, projected income will be $3600.Listed Price $540,000, Yearly Property Taxes: $16,500Finances:Current Income:$82,975.52 yearly, /12 months = $6914.63 monthly.Currently Expenses, showing in DTI:Mortgage: $2404 (after the refinance)Credit card debt: $14,000 in one card, monthly payment $140Savings: $80,000 (In my wife's account)Checking: $15000 (My account)Latest FICO: 700I appreciate your input!

I dont have a ton of reserve funds to have a vacancy for 3-4 months.