Keep in mind that the interest rate can fluctuate on those. 

My credit fluctuates between low 800's and high 700's.

Certainly there is more bookkeeping and tracking involved but again, you get the added benefit of not having to incur fluctuations in expenses like you do with residential leases, and your net rental income is consistent. 

Many appraisers come from out of area and thus, are not aware of these fluctuations which is how and why they can be so far off at times.

If you think your borrowings may fluctuate over time that may be the best option. 

Thus, more of what I wanted to know is that after the sale, will the appraised value for taxes fluctuate significantly too?

Im pretty even keel normally but the sheer amount of money I would be putting into this has me fluctuating widely between very excited and very nervous as interest rates rise and the market is nuts.

Rates are fluctuating everyday.

I wonder if STR / 1/2/3/4 mo type rentals for professionals could accomplish the same goal, as it’s common for rates to fluctuate. 

Especially now with the market fluctuating like it has been over the last few weeks.