I use my Sprinter as an office occasionally, mainly while parked in my driveway.
I have a Canon inkjet all-in-one that fits on the kitchen counter, and a laptop I use while sitting at the dinette. If I'm in the driveway, shore power is used. Both devices plug into a conveniently located outlet. If no shore power, both are plugged into a sine-wave producing inverter drawing juice from the coach battery, or I run the generator.
Neither device is secure in the sense that it wouldn't become a missile in a crash, so before I go anywhere, I put the printer and the laptop in the closet.
At home I connect to the internet via an Eero mesh wifi setup. Elsewhere I use a Sprint wifi hotspot.