@Brian Ellis Completely agree and thank you for the kind words! Now that we've taken some form of action, while it isn't a property on its own, it's given us the confidence that "hey, we'll figure this out. We just got to do it".
For those of you interested in an update. I spoke with my tenant yesterday when I got home from work. The conversation went something like this. "Hey, xxx how are you liking the place? Great, listen I know that during the application and signing of the lease process, things moved pretty quickly. I wanted to make sure you knew the in's and out's of the lease agreement that you signed and so I printed you out a physical copy (I put a sticky note in the section relating to smoking indoors). I'm not sure if you knew this, but there's actually no smoking of any kind in the unit. Last night, my wife and I were woken up to smoke coming into our room and the rest of the house. Personally, we don't care if you smoke weed, but it just can't happen in the unit as I want to be able to return your security deposit at the end of this lease. As your landlord it's my job to let you know.".
He was super understanding and thus far has been abiding. With anything new though, time will tell if it works out. As part of a compromise of sorts, I told him that I'd be picking up a few lawn chairs for him to use on the deck. Right now, we have a nice concrete deck but not any furniture (future plans of a pergula and furniture).