Part of my claim against her was for cleaning and painting due to the dog urine and feces and also marijuana smoking.

All four have been great, paid rent early, and cause no problems.Today the lady sent me a text saying she smelled marijuana in the young man's apartment and wants to leave because of this.

I do have raised garden beds which I do assign tenants should they feel the need to grow veggies (no Marijuana growing, Colorado folks, lol). 

Then, regardless of what happens with the police, I will start the eviction process.I don't really care about marijuana.

I could just see it now where your dead partners son with majority interest in the company is like "We're liquidating all this real estate and starting a chain of marijuana dispensaries!

I came back to California and am getting her house ready to sell.The lease states no smoking in the room and he has been smoking marijuana back there.

While growing and distributing marijuana is against federal law, renting property is not.It is legal to rent your property using whatever lease you like to any industry they like.From a business operations perspective, you will need to figure out how to accept and deposit cash because, as you say, marijuana industries have no access to banking.  

In my case, my tenants ran a marijuana farming operation, steallling electricity, and growing at commercial scale.

If the rent wasn't being paid, you smell marijuana or hookers / druggies were camped out in the hall that would be terrible.

suggest edible marijuana?