My AC unit has another 3-5 years before it’ll need to be replaced so I’m thinking this may be a clean exit before large big ticket items start needing attention in the next 5 years.

Give them the option of breaking the lease without penalty. 

Trevor, you can adjust your due date in Baselane if you're inclined to let her pay on the 3rd, but make sure you have also adjusted the terms of your lease to reflect that.

I had a decent set of renters that are leaving after their lease is up at the end of this month.

Also I am trying to hold onto it for the next 10 yrs at lease so if the 54321 offers me the lowest rate I would lean towards it.

Once you read the explanation below, you will understand how REALLY bad things can be if you don't get the letters but go through with the purchase.First, the owner/seller should have a clause in the lease requiring tenants to sign (or object to in writing) tenant estoppel letters if presented to them.

Self Sufficiency test is the important item for 3-4 unit FHA homes. 

You could explore triple net leases, purchase BRRRRs, or buy 1-4 turnkey rentals, among other options.

This should be defined in the lease agreement as to how it's covered (by the tenant or landlord) and how they're switched over when turnover occurs.2) Not sure if I'm understanding correctly, but any fees paid to the property manager should be separate. 

But then I was tapped out on access to funds, so I switched to creative means, obtaining the next 3 properties via lease-options.