Also remember the premiums are portable if you need to port them to another property. 3 years ago we bought a townhouse as our first house, and ended up doing a live-in/house hack flip that wasn't really intended when we bought it.

See this chart prepared by the IRS to learn more about the portability of various retirement accounts. 

Upon some reading, it look like it might be able to be depreciated in 7 years IF I make it a 'portable building' (think glorified yard shed)?

As the WSJ review said it is really a portable computer.My sense if you can use the web browsing capabilities to check maps, look up rental information if you use an online PM system and otherwise have info with you at all times (or access to the web with full web capability).Plus the ability to manage your email so you could check in with people handling a closing, etc if they need to send documents for review.Some other phones are pretty close or have the same ability for the activities above.Comments?

Just a thought for you Doomsday Guys:If it really goes down, the things of value you are stockpiling had better be portable.

What do you usually factor in for portable toilets, temporary power, temporary water, and other holding costs?  

Hence you may spend a lot less to have a system that works given there is less software to buy after the basic hardware.I am typing this on a Mac Portable.

The problem, though, is that land is not portable and hanging on to it if the wheels come off the bus could turn problematic. 

Here is some related reading:Security measures and alarms:http://www.biggerpockets.com/forums/67/topics/48239-how-to-you-secure-a-property-while-rehabbing-http://www.biggerpockets.com/forums/52/topics/51879-securing-vacant-propertyhttp://www.biggerpockets.com/forums/67/topics/43784-do-you-use-a-wireless-alarm-on-your-vacant-properties-http://www.biggerpockets.com/forums/52/topics/54839-portable-alarm-systemhttp://www.biggerpockets.com/forums/67/topics/8154-burglar-alarmshttp://www.biggerpockets.com/forums/12/topics/26494-a-little-advice-would-be-appreciated-HVAC and copper theft:http://www.biggerpockets.com/forums/52/topics/24010-alternative-to-copper-piping-for-hvac-unitshttp://www.biggerpockets.com/forums/52/topics/10655-frustrating-landlord-situation-stolen-a-c-argh-Doors and locksets:http://www.biggerpockets.com/forums/52/topics/44110-deadbolt-and-lockshttp://www.biggerpockets.com/forums/84/topics/26115-kwikset-resettable-locks-good-or-bad-http://www.biggerpockets.com/forums/84/topics/39477-door-frame-damaged-from-break-in

The pool and sauna are closed, as are workout rooms, and where I stayed, there was only  in-room coffee and no breakfast or snacks.