There is plenty of overlap. I would personally consider it that it permits and insurance are a part of it, then that pushes it into the realm of pro.
Running it at home can still be pro. For example, I purchased land to do a pro haunt with staff, insurance, business plan, etc. Hacker House does the same thing with several acres. I think SpookyWoods has the owners living onsite as well but with an excellent pro operation.
So the difference, if the fire marshalls are needed to open, you pull permits and insurance, you are pro.
The word for the day is NPD. Check it out.