My tenant is absent and I need help with this one. Please and Thank you.

[Marques Chisholm]

Hello everyone, I inherited a piece of property in Berkeley CA from my grandmother a few years back. I love the place, I've been renting out the units and getting steady income just as they were designed to do. Unfortunately I have had an ongoing issue with one of the tenants. This tenant an elderly lady who's on section 8. Her daughter was living with her (not on the section 8 voucher though), but has moved out because of issues she's had with her mother. My tenant had a medical emergency several months ago and is now in a long term living facility (simply put, she can't be on her own). She's been there for 8-10 months. Nobody is living in the unit, the city came out to inspect the unit, nobody was there to let them in (it failed because of this). The housing authority also came out after I told them nobody is living there anymore, so they removed her from the section 8 program and they no longer pay a portion of the rent. The tenants daughter was paying her mother's rent, but hasn't paid for the past 4 months. Now I get zero rent for the unit. I mailed a 3 day to pay or quit notice, obviously nobody was there to receive it. I have offered (5 months ago, to the daughter) to give her mother $1,000 for the keys to the unit. The daughter, who again wants nothing to do with her mother, counter offered me with $8,000, and that would be something that she could "talk her mother into doing". I want this tenant out, she has no timeframe of a return to the unit. Housing authority hasn't been able to reach the mother (who is the only one on the voucher) and when they spoke with the daughter, she stated that she doesn't handle her mother's affairs anymore. Ohhh, and I haven't spoken to the tenant in over a year, I've only spoken to the daughter. I need some guidance with this one before I just reach out to a lawyer. Thank you BiggerPockets team.