Is it better that the seller's mortgage gets paid (by someone else) and the property turned into a rental or should the seller simply 'walk away" and stop making payments and the property become vacant ?

Especially since you don't live in SD anymore.Lastly, multi family units and apartment complexes simply offer greater economies of scale for maintenance and other expenses because it's more "doors" under one roof.

The state is Florida.I did not consider this first mortgage an issue because I was simply going to live rent and mortgage free in this property myself, rent bedrooms, make good money and recoup my investment in short time (netting 4k income per month if you count not having to pay my current rent).

Or it simply can’t connect to Wi-Fi in order to change passcodes?

I can assist you with that. it simply sounds like youre tryna wholesale it to them, if im reading it right

Im going to have to pay for Private Investigators to simply research this because Renter's Warehouse won't answer questions or respond to requests. 

If Jesus came back and got into rentals NO, N-O-B-O-D-Y get's admin access into our system. 2) They want a standardized list for maintenance items so they know in advance what repairs would cost.Being a PMc I'd invite them to acquire any of the readily available construction estimating tools/software out there such as RSMeans, but would not take on such a task as building and maintaining such a database, honestly for any $, it's simply not what we do. 3) They want a copy of all invoices from contractors to us so they can verify we are not marking up more than promised.A-ok. 4) They want to be able to talk to our contractors before work is done (each time) so they can talk contractors down in price themselves.I'd be fine with this as long as they sign a waiver that they own any/all negative impacts that result from such including extended vacancy periods, vendor refusals of service necessitating there own self-search to secure amicable vendor etc etc.. 5) They mentioned that they pay around $300 for full paint in a 2-bedroom unit.... we do not have a contractor that will touch a full paint on a 2 bedroom for $300LMAO!

Additionally, there are many operators who simply don’t have that information.

You will have more wear-and-tear, simply because someone is occupying the house all of the time.

There just simply isn’t as much money to be made for the average Host in 2024.This increased competition, lower rates and occupancy, overly optimistic underwriting and lower travel demand post COVID travel boom does warrant a reasonable label such as “Airbnbbust”.TLDRThe environment has fundamentally changed and operators have had to do a lot more than simply list a property to profit heftily.