As we know practically anyone can get a medical marijuana card.

At this point, I do a quick google search on my phone and that's when I saw pictures of the house and of the marijuana grow operation that was taking place.

@Rob Bergeron Probably not the best forum for those topics but personally I've been buying marijuana stocks (I don't even smoke).

My biggest reason to keep my eye on Detroit is the recent legalization of rec marijuana.

We are testing millions of people, some over and over again and the amount of deaths (or death rate) has decreased due to better therapeutics and experience over 9 months.    

Am afraid your lease was not descriptive enough and may have a tough time in court.Take this as a lessons learned and start working on improving your lease from the things you are seeing with current tenants and then wait it out if you can, which you seem to indicate you can do.Even with a very tight lease, I paid close to $3000 in evictions not to mention the heartache from tenants that I inherited on my first duplex purchase where I lived on one side and rented the other.I will never again inherit tenants.These ones moved in an extra person a year and a half in, despite lease saying not to, smoked marijuana and cigarettes in house despite lease saying not to and worse, I lived on property so they became very sneaky about how they broke their lease and these was just a nightmare.I hate evictions, but I equally hate bad tenants and tenants that I have not personally screened and that is why I refuse to take on tenants at property purchase.I also always, always do unit inspections.I just did one yesterday and glad I did, which I had initially decided I would not do, but nope, get in there and see how your property is being maintained.My fairly new tenant seems to have an issue with basic housekeeping.There was a smell in the unit, which I still cannot figure out what it is, but brought it to their attention and will be following up, he has a car that leaks oil endlessly on my newly resurfaced concrete driveway and garage flow, has a ring in toilet bowl that is also stained and smelling toilet from lack of cleaning.It pains me to see a unit that I took great care of when I lived in it to see what it is quickly turning into but I am nipping that in the butt right now.Dirty tenants can be a liability to any landlord, but overall tenants will try to test you and see just how vigilant you are and how much they can get away with.I also make notes on what I want to update on my next lease when I run into issues.Pets?

Simply type "(City Name) Real Estate" and check the news section on Google for a plethora of headlines about the local market.Here are some recent examples for Sacramento:Home-flipping: How the Sacramento area compares to other marketsRedfin says Sacramento’s Hollywood Park neighborhood is one of the nation’s hottestElmhurst residents fight against real estate agent’s plan to open neighborhood officeCommercial Marijuana Growers Buying Up Space In Sacramento At Unprecedented RateSacramento apartment occupancy rates suggest rents going higher, report findsHere are some examples for Livermore, CA:Major Bay Area apartment operator sues Airbnb, alleging 'illicit subletting'Council Votes to Move Historic Train DepotBURGLARS STEAL APPLIANCES FROM HOMES FOR SALE IN LIVERMOREShopping center and hotel project slated for LivermoreTesla snaps up huge warehouse lease in Livermore, highlighting car ramp-up plansSo, how do you interpret these headlines? 

Yep I was buying it far below market value but she already knew that.A house I saw today....the owner had used it as a marijuana grow house and now wants to sell it quietly without blasting it on the MLS.  

I have a tenant who has an MMP card and is growing marijuana.

The upstairs tenants have been complaining (even though I told both while signing their leases do not call to complain to me) that son is smoking marijuana in house, supposedly selling drugs outside of house (questionable), and playing loud music.