Monkey,
Part of the problem is that you were never clear about what you needed/wanted to do and what you could count on for resources.
As a starting point, my now recreational coach started out as my mobile office/meeting room/tool crib and occasional restaurant and motel...
I had the color laser at that time and carried a separate scanner. Then came the problem. That printer would eat my inverter for a snack... Plus, it was heavy as hell. The weight damaged the dinette table. I have had that wonderful color laser for near 20 years, but it has developed a "rod knock" and the people tell me that parts are scarce.
When I found how impractical it was as a mobile printer, I bought an inkjet with scanner. This will run on the inverter. I think I could run it on flashlight batteries. Yes, it is a little expensive to run, but I always buy OE cartridges. The cartridges are the kind that include the print head. At first I did not like this because of the cost, but the advantage is that when you change out the two cartridges (one color and one black) you have a nearly new printer. That printer is about a year younger than the laser mentioned above and has had a hard life. It is still with me and now it is in the house until I figure out what to do with the 85# laser.
I never liked having to fire up the generator to print a quote for a client. This was back when a 1.5KVA inverter was expensive and LiFePo was for NASA.
Matt_C