We need to file our Homestead taxes.

There a way to go to court and force the other party to sell, its called "Partition Suit"  however, that's going to take filing a lawsuit, going to trial and paying an attorney. 

@Brennan VaughnMultifamily are a little different than their Single-family counter-part for tax purposes.Living in one state and investing in other states does add some complexity as you are now exposed to filing non-resident returns in other states.

She is now 4 months behind, which triggers my initial reaction to file eviction.

He lost the house in December of 2019 when the foreclosure was recorded and the deed filed in the bank's name. 

If you have to file for an eviction on day 1, this can make your purchase significantly more expensive.

However, without the right disclosures and legal filings, yes, you can be sued for getting it wrong. 

@Katrina CabralInvesting in a different state than one where you live may require you to file a non-resident state tax return with that state. 

If there is a quarterly/monthly lease that is active (paying status) and I file ejectment and quiet title would I still have no rights to assume the lease agreement or the land that the billboard is attached to?

Since this is CA the annual cost to keep the entities active would be $800 a piece for CA LLC fees plus a couple hundred bucks to file tax returns.