My opinion, based on over 7 years of full-time RVing, and talking with others who did remote work from their rigs… take it for what it’s worth:
You will NOT be satisfied doing what you want to do using cellular data. You may have connectivity & coverage… but you will have dropout & data loss.
And if relying on campground WiFi… forget it.
Streaming… not happening… ever… well, at least not in high-def.
There are only 2 ways that you will have satisfaction. The first is if you are at a campground or RV park that has a contract with the local internet provider that allows you lease a dedicated modem for your site/rig. Some of the higher end RV resorts have this, but your average campground will not.
The other is to install an expensive internet satellite dish on your rig, and pay outrageous fees for the service. During my travels, I met 2 guys that had this… and they were the only ones I ever met who were completely satisfied. One was a travel journalist, the other was in the financial field… and both were able to write off the high service costs as business expenses.
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM
2018 BMW R1200GS RALLYE