I didn't see a Biggerpockets book on commercial properties (maybe there is one that I didn't find) and I don't know which book to buy or which author to trust on Amazon.

My thought was that it would be best if she does the primary STR work and log her hours and ensure that she spends more time on the STR than I do (at least officially logged hours... since I will most likely always be thinking about the STR... haha). 

So, I’d dig into the numbers before making a call.Local zoning and code regulations: Converting a multi-family property to a single-family unit might require permits or specific approvals, so check with your local building authority to avoid surprises.

My clients and I have used Cost Segregation Authority with excellent results. 

One route is to explore refinancing these properties into your name with a cash-out refinance, which would allow you to access some of the equity while officially transferring the deeds.

I add people to my credit cards as authorized users for a fee.

Then send official notice.

So before you get ready to attempt to rip your Landlord a new one, first go take it up with the local taxing authority, then go have it out with the insurance industry, then gripe to the neighborhood HOA (if applicable), then maybe settle your disputes with Home Depot/Lowes and any and all trade contractors.

You may want to do some independent research on the respective Housing Authority website as well. 

I guess joining BP is now my official first step in taking a dive to this journey.