Does anyone have any experience with furnished mid term rentals?

You can offset other passive income of gains with depreciation from your long-term rental.  

for me  a handful since early 80s  now in those days I was ONLY buying land that had owner contracts on them. 

What started off as primarily a second home with the possibility of short term leasing quickly flipped to a STR first and a second home when not rented because demand is so strong right now for STR's in this area. 

Now with the NAR settlement, all buyer commissions are negotiable in the contract. 

Being out of state, I would suggest vetting your "team", meaning find an investor realtor, lender/s (hard $ / long term), property manager, contractors, etc.

Nonetheless, you can base the DSCR calculation on PadSplit rent (if there's a history of PadSplit income being produced) or short-mid-term market rent (an analysis done at the same time of appraisal).

I tend to shy away from homes over ~20 years old to buy and hold for long term renting.

I'm most interested in Single-Family or Multi-Family Homes with the intention of having Mid or Long-Term rentals (although I am not opposed to Short-Term either).

TECHNICALLY, this falls within the long-term laws because there are only 2 categories - long-term or short-term.