@Prashanth Mahakali or @Samuel Pavlovcik are always good bets to figure these types of questions out.

That way you kind of hedge your bets (aka Risk/Reward).Self Storage is historically Recession-Resistant as it has everything to do with Death, Divorce, Down-sizing, Dislocation, etc. - things that are prevalent in normal times and certainly, in not-so-normal-times, too.However, RV & Boat Storage is similar but different, in that approx 1 out of 10 folks in the USA rents a Self Storage Unit, and that is not the case with Boats & RV's; hence it being a much more niche strategy. 

Start with safer bets and slowly get braver to beat fear and win in the property game.Good luck

This will help some owners get back a little money from overages but I bet in most cases its the parish that will get what would have been my profit.

I'd bet it's not. 

I'd encourage you to talk to a CPA before choosing a path.Since you are already an agent, the odds are good you could qualify as a real estate professional status (REPS) for tax purposes. 

If they look similar, I'd bet they've just been listed much longer or AirDNA is double counting revenue - it happens a lot.

I can't tell what part of the country you are in but I bet there is one where you are...or one in the market you are targeting.  

That’s the best bet.

I really see Columbus Ohio as an extremely safe bet for the next 10-20 years.