My build (in progress) will be a mobile office also. Redundant internet access is a must - I use starlink with two different lte backups, tmobile and AT&T. I'm setup to add Verizon also if needed.
Starlink is not 12v native, you'll need an inverter for that. There are some diy plans online to make a 12v adapter but it'll void the dish warranty I believe.
This chart is useful for comparing diesel engines
https://docs.google.com/spreadsheets...Aff6p/htmlview
I personally am a fan of the dt466e. I don't like V8's, and I like the computerized engine (many prefer all mechanical). Almost everyone agrees avoid 08 and newer emissions requirements, most advise to avoid the 04 and newer emissions as well (I don't think egr is that bad to bulletproof). International/navistar makes their software for 08 and older free which is nice.
Chinese diesel heaters are very popular. I'm doing two.
You'll find that the people on this site are very helpful with just about any question you think of! Welcome!
Ps we love pictures as you get going!!