Personally all of my STR's could at least cover themselves as LTR's, although I acquired most of them pre-COVID and it is tough to make a retail investment at current rates and values that work as both. 

All your first set of questions can be answered by looking online or calling several local competitors.Your accounting questions though, show such a lack of basic knowledge that you probably shouldn't be doing this until you have more experience.

Look at a few each day online, or catch up with an agent who knows their stuff and househacked to give you some pointers. 

Could there be an existential threat in multifamily like Office had with Covid or Retail had with the rise e-commerce?

I'm fairly confident from reading online we don't qualify for an exemption, but I'm trying to assess actual closing costs to trying and reduce them All details:Bought the house 2.5 years ago for $980K (left on mortgage $753K), we have a clause for an assumable mortgage for me to take over (I can keep same rate).

Marketing homes during this period involves creative strategies, such as seasonal staging and targeted online promotions, to attract buyers even amid holiday distractions.

If you are listing it online, aren't you just in a sense just "listing it on market"? 

Opposed to buying used one at retail. 

Go online to Home Depot, Lowes, etc. just to keep tabs as to what's going on. 

Currently I use an app called "meet up" and for some time, a lot of their events in my area are all done online.