See the previous coverage for the long version, but the tl;dr is that renters that rent for more than 30 days are protected as tenants by California law, including (normally proper) long drawn-out eviction proceedings.
No, not if that was not under the original terms of the lease. You may own the building but in the eyes of the law it is the tenant's home and you can't throw them out onto the streets without due process.
