I know some people who have tenants living above with no issues.

I’m just suggesting getting tax advice from randoms on BP presents potential issues. 

Or should it be on just getting someone in there and dealing with those issues in the future when I go to rent out the main living side?

I spoke to investors in Cali that deal life cycles are commonly 9 - 12 month.I have a few Cali people in my out of state investment group. 

He replied, "I don't know how you keep finding sellers willing to do that".Here is the secret sauce, know and understand the seller's motivation, ask questions, and don't be afraid to ask for the terms you want.It is more common in medium-sized multifamily where it is a business but not large enough to be professionally managed.

But hey, it’s California…the tenant is suing me for 3x the deposit and may win.Here's my reality.

The property is 2 minutes from our house so that’s no issues for us to clean.  

I own a duplex, where one unit is being rented out as a long-term rental (LTR) and the other as a short-term rental (STR). My CPA advised me to split the generic costs such as property tax and water bills equally betw...

Have them perform specific tasks and issue invoices that the LLC would pay.

Definitely understand the frustration of your seller financing issue.