Check with several local credit unions.

Is there any legal notice i should provide to the tenant as per the laws? 

Another is to post a question in your local facebook group asking if anyone can refer anyone else! 

Pertaining to air rights and laws we do not develop in this nature so not sure I can be any help here.

I have to check on codes/laws/regulation, but I know CA is on a high of making thinks convenient to build those at the moment.

We have a development coming up for approval with the county adding over 100 units bordering our small town and you can bet everyone that lives in our town is upset about it. in the end though, the planning commissions in our area tend to follow the letter of the law so to speak, so if there is nothing in ordinance barring it, they will approve, generally.

Heck, even within offices, the small 1-tenant office buildings suitable for a dental practice or law practice, those are in a very different world. 

I did a little digging into zoning laws which may explain it.

As a local realtor, you can offer market insights while learning from experienced investors about strategies that work in the area.

https://tptla.org/Even though the law is the same across the state regarding tax sales, when you get to the nitty gritty, every county handles it differently.