I am going to paste what the listing agent posted as a remark in her listing, and then I would like to read your comments: Duplex with an EXCELLENT rental history!

It really depends on the scenario.If someone is in deep waters, BK, foreclosure, terrible credit, etc.You don't want to be above 60% LTV as that borrower has an incredible risk of default.

Have rehabbed and upgraded several times during its twenty yr rental history.

Post history would confirm that.I called him out for preaching that (finally) after trying to say that, yet giving the opposite advice for the past few years indirectly.

When this Policy applies, guests can cancel their reservation and receive a refund, travel credit, and/or other consideration regardless of the reservation’s cancellation policy, and Hosts can cancel without fees or other adverse consequences, although their listing’s calendar will be blocked for the dates of the canceled reservation...What Events Are Covered...Government travel restrictions.

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

Here are a few below:Generally, buying through your personal name can reduce the interest rate - commercial rates on LLC mortgages are usually higher but you can research thisMost LLCs on incorporation don’t have any credit so it may be difficult to find. a lenderIf you own the property in your personal name you are exposing yourself to more risk and will want to transfer the property into LLC as soon as you canIf you own property in your personal name and transfer to LLC the lender may not allow or can call the entire loanLLC or personal ownership you need insurance.If you search the forums for this topic using the magnifying glass feature in top right corner of your screen on BiggerPockets you will find a lot of discussion on "Quit Claim" "Buying through LLC", "LLC or not" etc....

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

I only have credit card debt with a minimum monthly payment of under $300. 

Don't know the whole picture, but if you have good credit, you should be way below both points and rate.