I'd definitely recommend not going with an LLC in CA simply due to the franchise tax and the admin burden here.

It's understandable why many investors and/or accidental landlords would opt to simply self-manage.

I don't know the cost of your fridge, but my CPA would simply expense it.The funny story is a rehabbed a house, bought appliances in a refrigerator, hot water tank and depreciated the entire rehab over 27.5 years.  

There is simply way to many things that can go wrong building a new home with zero experience.

You simply have no credibility otherwise :) 

This is simply the reality of the paradigm we are living in today.

Ignore their attitude (yes it can be hard) and either start with an eviction as they are in violation of their lease for non-payment (the $900 they owe) or simply do not renew their lease. 

Perhaps someone can tell me if it is alright to simply post here the contact info for George our consultant.

That said, it could be that the location of your property has some sort of local ordinance that has a 90-day limit, and Airbnb is simply following that.

Does anyone know if the fire sprinkler system will be needed if I simply rezone the basement as part of the first unit?