Pshaw, Toughbooks. Real men use Dolch. (A friend had green screen version of one of these that came from Israel. He wrote his essays on it.)

http://www.computinghistory.org.uk/det/32672/Dolch-PAC-486/

As for the build like this, there is always the option to throw in a lot of modular battery capacity. With waterproofing it would be great for outside long running no grid projects.