We repeatedly explained that it’s not done that way in New York State: here, you send in your articles of organization to a state office and they send back a letter with a state seal acknowledging they received the documents.

If your mental health is so fractured that you can't go to an Open House on a four-family down the block from you, that is something to focus on first.

Recently came across a lake house which we would like to rent out for weddings and event venues. The local Mayor is saying we cannot reuse the space for this. While no formal laws say this is restricted, we are gettin...

Block out the dates of future bookings. 

Hopefully the first letter and threat of eviction record will scare them to leave, or it could drag out for months.

@Grant Shipman, I will say, I have not explicitly seen anyone violate these rules (that I know of), but more commonly there are a lot of people who have comfort operating at the margins.I.e. compliance officers/attorneys that stop at the letter of the law may say: "investment manager X, you can advertise your company all you want.  

For Airbnb, do i allow STR stays for the next three months and then block out the calendar beyond 3 months for MTR stays?  

If it's on your credit, you are on the hook for it.However, it shouldn't effect the loan process too much, a simple Letter Of Explanation should be able to get the job done with the correct investor. 

I would shoot him a text and follow up with a letter through the mail to be 100% sure if I was concerned.

If you go RBTR, here are a few key criteria I've seen to assure comfort of living and lower vacancy / turnover:- at least 400sqft per tenant and no more than 2 tenants to 1 full bath -excess parking where folks aren't blocking each other in and you're not getting complaints from your neighbors about overtaking the street parking.