Dig deeper and don't be afraid to walk away. 

I figured lawyer could handle this, so other than me obsessing and digging through records for the past couple days, it becomes only money from here on.The seller is a sleaze.

A follow-up question might be this: where can I dig for clues about things that are coming down the pipe, so to speak? 

I think you might find that to be the case as you dig in.

As usually the owner does that.if you want to dig more into learning about self storage, I would highly suggest using the search function on this site as well as paying attention to posts by Scott Meyers and Michael Wagner and Michael's blog all thing self storage. 

@Jimmy O'Connor I appreciate your reply, I’m still digging deeper on the locations.

-rent is getting around 22-2600 a month from local compsCurrently i don’t know the formula for 50% rule, I’ll do some digging.

Use a snake to cut them, put root killer down drain, or, if none of those work because there's too much, then you dig down and replace the section of the pipe where they are getting in. 

Bergen - Lafayette North BergenUnion CityMontclairBayonne, NJElizabeth DoverGreenvilleHudson CountyTrying to dwindle this down to at least 4 or 5 that I would dig deeper into?

BUT if you can be local do it, try cold calling and doing digging.