Marijuana growing in my rental

[Mr Good]

Hello. I rent a house with a separate garage to a single mom and her 12 year old son. She pays on time, has been in for a few months.

I recently had a contractor rake up all the leaves and do a nice spruce up of the property. Today I went to have a look, then noticed she put a new lock on the garage door. She has the windows all covered but I peaked through on one side and see clearly a single marijuana plant with a proper grow light and a fan. I have been in this garage about 8 weeks ago and it was cluttered with a ton of her junk. I don't think she has room to turn this into a mega grow operation. Power bills do not indicate heavy electric either.

I decided to enter the house to inspect for plants in the house. She was not home, I went in anyway. She keeps the house orderly and clean. Her son's bedroom looks like a typical 12 year old. There is nothing inside the home that concerns me.

I am not sure what to do. I have a concern that the wiring in the garage can not support even a fan and grow light 24/7, it is a fire hazard. Aside from that, I need access to the garage in case of emergency so I need a key to the door. And there is the problem of it being illegal.

I am inclined to serve notice that she has broken the lease and to move out, but then we have lawyer fees. And she pays well and keeps the house clean.

Another part of me wants to have a face-to-face personal conversation and tell her that she can keep one plant there as long as she removes it while I have an electrician wire the new outlet that I had already planned for that garage (there is a "home run" on its own circuit going to the garage but it's not yet hooked up as an outlet).

Tell me what you would do please. Thanks!