Smaller multi-family is significantly more common in the Northeast, Midwest, and Western cities who had their economic boom in the roaring 1920s-60s and thus, tons of high density zoning was developed across the country (but not the South).

They are the easiest to locate in the easiest to sell, and they have the largest market of possible buyers. 

Start by evaluating your current financial position, setting clear objectives, and focusing on strong rental demand, population growth, and economic stability.

The appealing aspect here is the ongoing population growth and other economic factors.

Not sure any of this is important to you, but whoever you work with will be responsible for putting you in the single largest piece of debt likely you have.

STRs generate about as much hotel tax revenue as the hotels/resorts so there is support at higher levels:  https://poconosvro.wildapricot.org/Economic-ImpactLocal regulation is rough.  74 municipalities each with their own zoning and STR ordinances plus most of the housing stock is in planned communities, many were built as vacation/resort summer homes.  

. - What's the ONE most important task you can accomplish during your day that has the largest impact?

Source: OneKeyMLSBrooklynBrooklyn (Kings County) saw a jump in inventory and also had the largest increase in median asking price ($400K) as seen above.Despite increased inventory and seemingly inflated asking prices, properties are selling just as quickly as they were last year.

The Error by the Tax Appraiser may have caused you and economic loss. 

I try not to guess about macro-economics.