Wording for a notice to move for full renovation

[Don Bessette]

I have a 30 plus year tenant that can not keep up with maintaining their unit, it is filthy inside and in desperate need of renovation, all systems are in good repair and I respond very quickly when issues are brought to my attention.

It is also well below market rent, and they struggle to pay the current rate.

Looking for suggestions on how to gently proceed with the notification to move.