You could wear a mask all day, and go touch a public surface (escalator/stairs railing, door knob, etc) then go grab an apple from your local grocery store, take your mask off, and eat that apple.

If so, and if there is only one unit testing positive, that is likely your common area smoking unit.Check this out: https://www.amazon.com/THC-Surface-Residue-Detection-Test/dp/B00BPX4XW2I've never used it and don't know anything about it. 

:D While this advice sounds good on the surface it is in no way practical in the real world.

Always ask yourself "what is great about this situation" even if on the surface it seems like a bad one.

I promise I'm not bragging as I am a very humble person, all I want to do is give more insight on my current situation than the very surface (Works 20/Hours a week at a sandwich shop guy). 

When I say uninhabitable, I mean stripped of all copper plumbing and wire, vandalized, holes in the roof, flooded basements, every surface of the house covered in mold, failed foundations caved in with the basement full of dirt, man-sized holes in the floor and some that were absolute tear-downs.#3. 

They want it so bad, they're willing to work a crappy job for it, to live in a tiny apartment in Staten Island and pay ridiculous rent, to smell awful smells, to touch grimy surfaces, to be deafened by sirens and traffic day and night, to be assaulted on the subway, to live with rats.

What I was just saying the real value of a decision good/ bad always comes to surface.

For example if 100k is being financed, the seller can include the interest cost in the price itself and agrees to take a monthly payment. on the surface it looks like 0% financing but actually it is not.

This is great, thanks Chinmay J for really pulling that to the surface for me.