Each of us has distinct skill sets.

The distinction isn't always obvious...vacant houses sometimes look occupied and occupied houses sometimes look vacant. 

For whatever reason, Fannie / Freddie's underwriting guidelines makes a distinction between an LLC and those other entities.

Some other important distinctions are that co-ops are typically cheaper as they are "double leveraged".

STRs are absolutely possible throughout the Charleston Metro area, but each municipality has distinct rules and regulations.

Obviously, that leaves a lot of room for interpretation/negotiation, but the distinction is important.If you squeeze an extra $1000 a year out of a 4plex, it will still appraise based on similar properties.

However, most of the time cash is needed to transact.The distinction is that the cash doesn't have to be yours, which is where most of the NMD strategies come from :) 

Everywhere in the US has a fairly distinct offseason other than Southern California but the prices are too high.

I have only used my HELOCs for RE investing so while I am sure it came up early on with my CPA, I did not remember that distinction.

Wholesaling via the method of using an assignable contract would bear almost no distinction from a net listing, which would be illegal for an agent in MD.