When you say HVAC, do you mean just the furnace or is there central air for the units?

This is what I got from the seller.Remodeling: No remodeling has been done recently but is still in good condition and almost like new: a new 50-year metal roof; new central air and heat; new cabinets, sinks, etc., in the kitchen and baths; new flooring; a new driveway.  

think about your first 1 to 2 to 5 to 10 years of ownership of a property, and the difference between:-a 1-year old furnace under warranty, and a 35 year old furnace-a house with central air, and a house without-a house with a brand new roof, and a house with a 25 year old roof-a house with a knob and tube wiring, and a fully rewired housewhich is going to have more capex? 

Air BnB's and property management are two VASTLY different areas and what you've learned being a co-host does not necessarily qualify you for PM. 

Being without air for 3 weeks in Florida in the summer is unacceptable!  

The air bnb’s help page was more informative but I guess it’s still not clear to me what is allowed other than a multi tenant building that you own.

We are doing individual room rentals it’s a 6,000 sq ft nine bedroom home Things I have heard to include besides basic items are air fryer insta pot tea kettle vacuum sound machine black out curtains and full length mirror We do plan to add a sauna, exercise equipment and possibly a hot tub.

The property is equipped with modern amenities including forced air heating and central air conditioning, ensuring year-round comfort for tenants.

I have air dna to look for my own deals. 

I will post the live link in here so anyone can come and help you.I invite you both to come on with me, air your gripes for newbies, and explain where in the initial post you felt attacked.