I looked at a building that had a 3 bdrm/2bath owner unit with a humungous RV garage.

Unfortunately, this means that if these buyers are successful, they may not renew in 10 months, so we have to pack everything up and find somewhere to live.

For example, if an incoming tenant had something mailed to the house while the old tenant was moving out, and the outgoing tenant 'packed' the box up with their stuff, can i disclose one tenant to the other?

There was a ripped up pillow or something else in the closet as there was tons of stuffing on the floor.After clearing out the mess of stuffing and other junk on the floor, the contractor found "about 20" piles of old dog excrement.The tenant must have had so much money by not paying rent, that she could afford to buy a bunch of food and leave it behind in the fridge.That's a huge pack of chicken on the bottom shelf there. 

FYI, Home Depot is selling 6 packs of battery powered CO detectors now for about $95

I keep a box at a pack and ship store (like a UPS store) that is centrally located near my rentals and open 9am-7pm Monday-Saturday.  

Thats months of sesrching, dtiving, moving, packing, instability.Best tenants want and need stability.

Your tenant will have the option of packing up and moving as they see fit.  

One Saturday night after about 2 six packs of PBRs ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

A 6 pack of Zima?