There are already plenty of vacation towns that have straight out banned them.

it is a proprietary algorithm. if you question it you get banned

The only regulation that still stands in BP that you mentioned is that BP can ban short term rentals.

If you relocate and now reside in a new area that is outside of a reasonable commuting distance from the current home.Additionally if you plan on getting a second FHA loan, the lender must evaluate your circumstances to determine the circumstances behind the need for a second FHA loan to determine if it is legitimate or not, items include... length of time the previous property was owned by the borrower, and  circumstances that compel the borrower to purchase another residence with an FHA-insured mortgageThen there is also a big disclaimer at the bottom which reads:Important: Under no circumstances may investors use the exceptions described in the table above to circumvent FHA’s ban on loans to private investors and acquire rental properties through purportedly purchasing “principal residences.”

If they have history of overdraft on more than one account, the time of their ban might be few years.These people might have good income (4-5 rents) but they can pay only cash or buy money orders)I agree that no way I'd drive to collect the rent - I have a bank account with a bank open 7 days/week, so nobody would have excuse why the rent is late.Mailing is an option on my lease but I state that Rent is considered delivered when deposit clears...it might take 3-5 business days after the check been delivered.

I really like BiggerPockets and I don’t want to get banned

It claims that I banned.

They are essentially banned starting next July unless it's your primary residence. 

Can't speak to the west of the US, but in the east those types are banned in many places and treated as manufactured homes in others.

An installment sale to a dealer, which results in:a) deferral of capital gains tax (for 30 years);b) an installment note from the dealer, which pays the seller interest-only payments for 30 years, and ending in a balloon payment, at which time the principal is repaid to the seller by the dealer and the capital gain is recognized.2.