Caleb has been looking for a mini form factor computer like a NUC to do 3D modeling. Leo says that 3D Modeling requires serious horsepower from independent or discreet graphics cards. So a NUC or Mini ITX computer may not be up to the task. Especially if he wants to be battery powered and mobile. That would require a lot of power to run.
Caleb should check out the River Mobile Power Station on IndieGogo. His biggest challenge will be a monitor, but Caleb says he has a smaller Cintiq he can use. Leo suggests getting a hard shell case that photographers use that's big enough to have a foam insert for the monitor and PC.