I know that I don't want to mix personal with business finances.

Still a good idea to get your ducks in a row with a lender and have them do an initial underwriting and have them be prepared to answer a call from a seller, but they likely won't write up a letter.

Today I opened up my mail and received a letter from a legit mental health professional in the area stating the young lady was prescribed an ESA.

@Nick Shri get an estoppel letter from the tenants showing the lease terms, security deposit, when they pay and any verbal agreements.

I rented low income apartments and probably only evicted around 20% of the time.The letter gives them reason to call you or pick up the phone.

Prohibiting any "mixing" of residential and commercial uses in pre-zoning areas where many mixed uses exist.4.

Not surprisingly after receiving legal letters and as the pandemic subsided Starbucks decided to pay the rent money that they owed.

@Drew Sygit after they got the letter notifying them of the eviction yes.

This doesn't change the structure of the loans by much but they will want more money down and likely more letters of explanation about your situation. 

What is the unit mix?