I feel it's time for me to provide you with the same kindness, Good luck James, No earth shattering inquiries here.  

First, I would get with two people, an investing friendly real estate agent which you could connect with on here as well as a local lender.

Just shoot me an email and I'll provide you contacts to a great landlord attorney, investor friendly CPA, and also the necessary steps for leasing to the new tenants, as well as the renewal of the current tenant if/when that has not been completed yet.

There "west" by many measures and they have one of the most oppressive everything or anywhere on earth. 

Even being in a tenant friendly area, it sounds like you have several valid reasons to not renew this lease.

I was asked yesterday by a good friend of mine who has got 1-2 rentals in the last year and I wanted to check with you all first.

There are turnkey companies or platforms like Roofstock that assist investors in doing so or you can contact property management companies or look for investor friendly real estate agents in that market to assist you.  

The kids can always go to a friend's house while you're there.I'd also look at when her lease is up for renewal and tell her you are not renewing her lease and she needs to find another place to live.

I’m looking to team up with two friends who are eager to move out of their parents’ homes.

San Diego and the surrounding areas are VERY ADU friendly so there are properties with options to add one in the back that are really starting to pop there and could be an alternative option.Take it slow.