NO ADVERTISING IN THIS FORUM.

Is it common/discussed on BP frequently?

I own and operate an internet advertising agency and I think I see a niche where my agency's skills could be profitably employed. 

I.e. common lights

How common are special assessments in townhouses vs condos?

Unfortunately, as is common with specific CPA questions, you are not going to get an easy answer.

Depending upon where you are in PA, zoning and land use may not be a problem, but apparently there are lots of hoa's that sue and or get sued as a result of common issues, so insurance can be crazy expensive  or prohibitive.  

It can also grow in rooms that have high humidity as well, above 60%, very common in attics and closets filled full of clutter in the basement. 

I would think in at least some of the markets your area that is a fairly common way of finding tenants. 

Almost to the point of purposely advertising under a false assumption.