If you have a duplex, I am not sure why the other tenant "non-messy" tenant didn't give you a ring about the grass/weeds situation?

@Jerry Puckett I think (that can be dangerous) that the OP is buying this wholesale, not wholesaling the deal.If this is something you want to manage on your home then I would simply play it by ear. 

From the little bit I know from reading about start-ups, it is very tough to break into that ring without some help or knowing people in the industry.

Ring doorbell and Schlage lock?

A house, temple, or palace was built, it stayed until it was rotting around your ears, and then you tore down the bad parts and rebuilt it. 

In contrast, bad tenants don't like the MTM leases (another form of self-screening) because they know they'll be out on their ear in 30 days.

Oh my, my ears are ringing from all the noise! 

I was a "We Buy Houses" sign guru and my phone never stopped ringing. 

but I Also saved many from getting led around by the nose ring from so called investors who were really just all hat and no cattle.. have to guard against the wanna be investor also.   

They will be your eyes and ears.