First off, I wanna say that I like Phoenix, although there's not much to do after 11pm. I stayed at the Hyatt downtown on business a few years ago, and mostly hung out & got drunk at Chuy's around the corner
A few things to consider:
-USB has approximately a 15ft cable run limitation; thereafter you will need a powered hub to run things reliably. It may work, but not very well.
-You may want to go higher than 150w on the inverter, that will just barely run your equipment. Give it some headroom. A better solution is to convert to a DC-DC power supply in the PC. Inverters drain more juice than a straight DC supply.
-Computer optical drives are more prone to skipping; they aren't designed for rugged use.
-You'll need a proprietary software interface to use the touchscreen, otherwise you'll have problems with the touch interface; i.e., icons and such will be too close or too small.
Hope this helps