You could always use those to prove they were smoking up; with that proof you can either move to evict or simply hold security and at least have some sort of proof.If you install a marijuana smoke detector I wouldn't even tell them what it is (aside from a smoke detector) as they might try and disable it.

Thankfully I think that "click bait" of sorts is quieting down a bit. 

But you might be able to work out some sort of agreement with a tenant to fill that role for a slight rent reduction.

Do you know how I would go about selecting a new vent if I wanted to do this myself?

Yes, we do have good success because the property selection is based on data and analytics not our opinion.

I want to ensure that I follow any sort of regulations and safety standards but I don't know where to even start or know how to estimate rough costs.

The walls on the second floor show white chalking and also some sort of drip marks.

To avoid going through the same poor experience, keep reading.Even if someone gives you a referral here, do NOT make the mistake of assuming that the PMC will meet your expectations, just because they met the expectations of the referral source.In our experience, the #1 mistake owners make when selecting a Property Management Company (PMC) is ASSUMING instead of CONFIRMING.It's often a case of not doing enough research, as they don't know what they don't know!

Both on the purchase end and in the execution of who is going to handle your properties.There are a lot of PMs that take on hard to manage C and D and do well with it because they know they are going to be able to charge all sorts of fees to corral these types of tenants. 

What sort of terms would the USDA contract contain?