Start by deepening your understanding of CRE fundamentals, including net operating income (NOI), cap rates, and lease structures like triple net (NNN).

I’d also recommend getting a few quotes, including at least one from a mortgage broker.  

Would you share 3 specific things I should do during my "training period" (if it includes a book, which one)?

@Robert McKay, yes, I believe it was for IL tax withheld for those of us who chose option 1 (to be included in their IL filing).

In that they will detail the scales they use, including at which level of renovation it's possible to get things "reset" so it is appraised as if it is a new built property.

This was a cost-effective way to meet our requirement of providing just a stove and refrigerator (we don’t include washers or dryers), without breaking the bank further.But here’s the twist: If we were upgrading appliances for a long-term tenant with a stellar payment history, we might invest in brand-new appliances.

Stairs are the only way to get in, no grab rails in the bathroom, ramps that are too steep, etc.From what I've read, all commercial businesses/buildings (including ones before the ADA was passed) have to comply with the rules, unless it would be outrageously tough to fix (like installing an elevator in an already built building).Are all these local business just not complying and taking the risk, or am I missing something? 

Include in your model rates going up by 2%, and just make sure you enough cash to cover. 

I currently have 7 rentals units ( two three unit properties, an investment condo and a garage space) Currently I accept many forms of payment including Zelle, Venmo and paper checks.

I would notify her in person and in writing (big note on her door) including quoting the clause in the lease where she is responsible, and tell her you will be inspecting to insure the heat remains on, high enough to protect your unit, or she will be breaking the terms of her lease and also liable for any damage done in the downstairs unit as well.