Buying a 2-unit both tenant occupied, need one for me.

[Sam K.]

Hello BP Community,

I'm about to become a first time home owner in San Diego City. It is a 2-unit property, both are tenant occupied. I want to occupy one of them as my primary residence. 

Facts:

1. The unit that I want to occupy has the same tenants for past ~3 years
2. They are current on all rent, no security deposit
3. Lease is month-to-month
4. Given where I'm in the process of buying the property, I'd doubt I can ask the seller to have the unit vacated

My research:

1. Given they have been here for more than 2 years, I need to give them at-least 60-day notice
2. My "just cause" is that the owner wants to reside in the unit. It will be my primary residence

Concerns:

1. How should I approach this? On closing the property, should I just have an open discussion with the tenant and give them a 60-day notice? I do not mind if they leave sooner.
2. Will an eviction ban due to Covid-19 cause concerns? They are current on rent so my assumption is that they do not have a financial hit due to covid. From my reading, the eviction ban is only in the case the tenant is facing a financial hardship, and my just cause is valid.
3. Since this has been their home for few years, I can provide some assistance to them to aid the move. Is this the norm or the ethical thing to do?

Feel free to link up other posts if they answer similar issues. Thank you!!