An old property manager of mine had heard of a portable security system that you could take from rental to rental and pay a small monthly fee for monitoring.However, he can't remember what it was.  

Does anyone use portable printers for onsite printing of documents?

The portably washer / spinner units are tolerable if not used frequently.  

Florida has a property tax portability law that allows you to carry a percentage of your old homestead exemption from one house to another.

I like Realtyman's idea with the exception that I would get a portable HD and create a special folder for it,scan,turn the file into a pdf or word doc file then transfer it to the portable HD.

These are the portable, inflatable "houses" that kids can play in in the yard.

So, that explicitly bans bandit signs.Line 7 in both covers "portable signs". 

Sleeping bags and cots, a few portable chairs and table and a tv.

See link below.http://www.homedepot.com/p/Master-Lock-Portable-Set-Your-Own-Combination-Lock-Box-5400DHC/100124915

HDMI, SD, multiple USB ports etc.Cons You take a small hit on portability for a laptop vs ipad, but there are some very slim and portable laptops available.