@Nathan Gesner Thanks for the advice. I am a first time landlord so this will be a learning experience for me.
I heeded your advice, relaxed, and waited until the tenant was 3 days late on rent on December 4th (per their existing lease: due on 1st, late after 11:59pm on the 3rd). I called and left a voicemail to inquire about if there was a problem in paying rent. I suspected that due to non-responsiveness that they were avoiding paying, so I went over to the property to provide a Pay or Quit notice. To my surprise, they were outside so I requested a conversation with them outside about why they did not pay rent. They indicated that they were unsure if they were staying or not and besides, they gave a security deposit. After explaining to the tenant that the security deposit is not a replacement for rent, they began yelling and decided that they needed to leave. I decided to proceed with the Pay or Quit notice and taped it to the outside of the front door (I cannot access inside of front door since I have no keys). They have until Dec 7th to move out.
I am worried about a few things:
1) Given the attitude of the tenants, I am worried they may try to damage the property in some way. Is there any way I can be proactive in preventing this?
2) Since I have no keys, do I have the right to have a locksmith change the locks by Dec 7th, as long as I provide the tenant with a key immediately? (TX property code states that a landlord can lockout a tenant without keys, with advance notice and landlord must be available 24/7 to provide a key (section 92.0081)). I was going have a locksmith out anyways since the previous owner did not provide me with a key, but now I am not sure if I can. And since I will be starting eviction proceedings on Dec 8th (if tenant has not moved out), I don't want to jeopardize the eviction by changing the locks. Any thoughts or am I stressing too much again?