Offline USB Builds

Hi, We currently use CDT \ MDT \ OSD TS for our builds, we have been asked if it is possible to create a offline USB version of the build as a temp solution for builds to take place off site until a network connection is implemented. We are toying with the idea of 2 TS one which will be on the USB and load anything that doesn't require communication back to the DC's and another that can be run on site that will then do all the domain tasks activities.

Is there any advice out there that would be help or someone that has achieved this scenario to get offline usb builds to work?