Looks like a nice inexpensive little machine. If your interest is in emergency communications, you probably should think about power. Depending on which battery you pick, you're either looking at 11 or 12W. To run 3 days from battery only power, that's about 72AH of 12V battery just for the computer alone.
In contrast, the "One Laptop Per Child" project is looking at 2W of power, or 12AH for 72 hours of operation. Depending on your application, the difference can be significant.
