as noted - any smith worth their salt should be able to rebarrel it in not much more than a few mins with very basic tools. the only thing not mentioned above would be a set of go/nogo gauges to verify that the bolt headspaces correctly with the new barrel/barrel extension.
make sure you order a barrel with the correct extension on it though - the AR-10 platform isnt nearly as universal as the ar-15 platform is... there is no "MIL SPEC" for ar-10 stuff. if you have any questions talk to whoever you're ordering the barrel from, make sure they're aware its for a DMPS G2 and they'll steer you in the right direction.
generally speaking swapping a barrel on any ar-platform rifle can be done in just about any garage/basement workshop in the country with only a few specialty tools and following simple instructions from a number of youtube videos. mechanically speaking the process of changing an ar-10 and ar-15 barrel are basically identical and the only real difference is paying attention to the proper torque specs (45-90 ft/lbs for ar-10 vs 35-80 ft/lbs for ar-15)
