Many people are finding themselves in the same position as you due to local regulations.

Usually the landlord regulation is not applicable if it is SF with owner living in the unit, just saying.

There's a limit to how much repairs can cost vs. a complete raze and re-build(will check current regulations to see what they are).My only concern are the liens and the problems inside.

Generally speaking, per the NYC Zoning regulations, a R4B is limited to a maximum of 2-family homes.

I keep telling my fellow US investors how spoiled the are every time they start complaining about something (taxes, fees, regulations, rent, compliance, etc.) in the USA market ;-) Try making it in Europe and you'll need to toughen up by bringing along more time, patience and expect less yield.

Depending on the purpse of the BPO and regulations in your state, you can just call a broker that you like and have them give you a BPO. 

Purpose of the Leasing Management Program The primary purpose of the Leasing Management Program is to regulate and monitor leasing activities within the community. 

We have seen a general drop an overall short term rentals mainly due to regulation.

Understand the demand, seasonal trends, local regulations, and competition in the area.

San Diego is expensive to Purchase, maintenance and cap ex is expensive, property tax at purchase is expensive in terms of dollars (average SFH prop tax at purchase is ~$1k/month in San Diego), new retail (MLS) purchases are negative cash flow when allocating properly for expenses, it is tenant friendly in terms of regulations but this is largely due to the big advantages LL have due to crazy low vacancy rates.