I've analyzed 5+ self storage deals per week for years.
At this point I need two metrics and 3 mins on Google Maps:
Asking $
Revenue per month
If its >20k square feet and AP is less than 90x R/M its time to dig in and take it all the way through underwriting / market analysis
Another way:
Asking Price per rentable square foot of property
Rental rate for 10x10
You can use the rental rate per year and compare that to the asking price and get a VERY good idea of what your returns are going to be.
This is simply my smell test.
If it passes, I dig in and figure out:
-How much I can raise rents
-What my unlevered yield (CAP rate) will be first year
-What my expenses would be
-What the value will be at 18 mo when I get it stabilized