Legal Issues with Problem Tenant

[N.A N.A]

I am new owner of 7 unit apt. building in Beverly Hills - Elderly couple has occupied apartment for 10 years without rent increase prior to 6 months ago. They are month to month (not title 5) and they are difficult and demanding to manage from out of state. I found shopping carts stored in laundry room, in carport (hidden and covered) and I backed my new car into one which appeared mysteriously. Determined couple responsible.

Actions taken.
1. I knocked on door and notified them storing carts on property was violation of lease, and abandoning in alley was a blight on neighborhood. Requires permission of store owner and should be returned promptly, not left or stored. They became aggressive, admitted it was them and slammed door in my face. I received a voice mail stating they did not appreciate a knock on door as communication and since she had a "disability" (doubtful as she is fully ambulatory) they would be storing carts in laundry room.

2. I wrote a handwritten letter notifying them I was terminating there tenancy effective 65 days from Today when I would be sending a certified letter. I thanked them for their tenancy. (I spoke with BH code enforcement and they told me I could terminate lease for "no reason" as long as I did not achieve higher rent than allowed under rent control.

3. They had previously called my handy man directly requesting the handle on the new toilet I bought them replaced as it was "starting to break". The handly man had told them he would be by Monday mid morning. I sent my brother over to look at it and he was verbally abused and refused entry. I knocked on the door and was told only the former handy man would be allowed in, that they refused to speak with me and slammed door in my face.

I documented conversations and sent email to myself to time stamp.

Question

1. What are best practices. Do I need to lawyer up? Issues to expect.
2. Any advice on a good remote monitoring video surveillance system

Thanks[b]