What are the local regulations to be aware of?

Roma in Mexico City is an awesome area for lifestyle but there's but STRs are going to be regulated there and possibly banned and LTRs are not a profitable alternative.

AND you say that you also get there stated physical impacts, so with that your ASKING there assistance in coming to a REASONABLE Accommodation that both meet's there needs AND adheres to the rules of the property, other tenants and all applicable statues and regulations. 

Be sure to check local regulations on door-to-door marketing.By focusing on these methods and providing incentives for effective delivery, you can effectively reach motivated home sellers directly and increase your chances of finding great deals.

I know the rules for Owner move in state that: "The existence of a vacant comparable unit in the building which is also suitable for owner-occupancy is a factor demonstrating possible intent tocircumvent the Rent Stabilization Ordinance [RAC Regulation 613.04] ".

Has SF regulation changed during the past 7 years?

When you do buy a property, will you be prepared to manage it properly and prevent major losses by making rookie mistakes in the most heavily regulated state in the union?

MTR is actually even easier to manage than STR once you get the teams and systems in place. the regulations on STRs totally depends on your market.

It looks like the regulation will go the way of permitting and hotel-style taxation

There’s now a lot of NEAR money (liquid assets) outside of government regulated institutions.