They sell portable ones now that you can setup anywhere, anytime.

It looks quite comfortable, portable, and easy to use based on what people were saying about it.

Painful to set up, but you'll really appreciate the flexibility, portability, and ease of use.Rick

Not clear if it is possible to skip the software and save to PDF directly.There is also a slim version in the Scansnap series (the 1100) which is slower but portable (i.e. luggage sized)http://www.fujitsu.com/us/services/computing/peripherals/scanners/scansnap/s1100.htmlFujitsu Scansnap 1500 - $400 - Sheetfed - Desktop - Fujitsu - 600 dpi - Autoload - Duplex - 50 sheet - 20 ppmhttp://www.fujitsu.com/us/services/computing/peripherals/scanners/scansnap/scansnap-s1500.htmlNeatDesk - $400 - Sheetfed - Business Card - Receipt - Desktop - The Neat Company - 600 dpi - Autoload - 50 sheet - 25 ppmhttp://www.neat.com/products/neatdesk

You could also buy one of these portable alarm systems:http://www.tattletale.com/

The usual: divorce (especially in a community property state), health problem for you or a family member, uninsured/underinsured catastrophic loss for you or a family member (such as a personal injury car accident), a self-employed tax problem/debt, etc.The less usual: a local water district concluding that the water in the entire area causes leukemia or other cancers and therefore no houses are habitable (which is very possible in some areas of Texas), a prolonged drought that causes the local portable water supply to dry up, a major employer or employers moving out of the area/closing, one tenant (or other person) getting hurt on the property (and getting a multi-million dollar judgment against you), one local tax agency assessing a property tax on your property (I had one try to assess a $100K tax to fund an adjacent highway improvement....), etc.

A unit I am putting in now has a portable dishwasher which I see as a lot of potential water damage since it has to be rolled over to the sink and hooked to the faucet. 

Perhaps a battery with outlet like this would do the trick:http://www.extremetech.com/extreme/184571-chargeall-a-portable-battery-pack-with-120v-ac-wall-plug-outlet-so-you-can-power-all-your-thingsI've never used one of these batteries so can't comment on how well they work.

But its a very customizable system that you can use for every part of your business and its portable so I can use it fully on my phone or iPad while I am out looking at properties.The main thing here is this.

If you had a portable security system (if such a thing exists!)