Applicant 1 has 509 credit score.

Here is a great resource. https://www.areavibes.com/They give you a total livability score and you can type any address in 

That question depends on if you have enough other income to qualify.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Start by getting pre-approved for a loan, ensuring your credit score, debt-to-income ratio, and finances meet lender requirements.

RentRedi needs an option to have the landlord pay this OR just bake it into the monthly cost. 5) RentRedi introduced a feature to allow my tenants to report their rent to the credit bureaus to improve their credit score (cool).

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Merchants Bank MN See Pavel Ushakov>=700 (credit score), <=80% LTV the rate would be Prime - .25% 
>=700 (credit score), 80.1% - 90% LTV the rate would be Prime + .50%
>=700 (credit score), >90%, the rate would be Prime + 1.75%30 years; 10 yr draw, 20 yr repayment.

Catch is ... it is zoned at RM20-A, which for those of you keeping score at home, is apparently not eligible for a Non owner occupied STR. 

I tried to rent one of these buildings for a developer. it was brand new construction, really well done.One after another is was voucher applicants who had criminal records, you had no idea who was actually going to be living there, some were high out of their mind and/or drunk, average credit score was 500, consistent late payments, eviction records, etc.By some miracle I rented one place out to 2 young girls looking to save some money.