No need to reinvent the wheel. There is a whole community of location-indepedent, working-age RVers who have been working on this problem for many years. First, check out
Mobile Internet for RVers and Cruisers (I'm not affiliated, though the owners are my friends). They are *the* go-to source on this topic in the United States. Always testing the newest devices and trying out the latest plans.
But here's the TL;DR. No one uses satellite. Everyone is using a data plan from one of the major carriers. (Verizon is the best in my experience, but expensive. AT&T works almost everywhere, but can also be expensive. T-Mobile seems to have greatly improved its coverage, and tends to be cheaper than the other two. Sprint is terrible.) Then you can get a booster for greater reliability.
The best setup we've had is a Verizon hotspot, with the two ports that connect to a MIMO antenna. A MIMO is only $30 on Amazon, while a WeBoost will set you back hundreds of dollars. The key is getting the right hotspot because there's only one Verizon option that can connect to the MIMO.
Google Fi and Skyroam are options for outside the U.S. Scott Brady says he loves Google Fi, but not in the U.S. Our major carriers are superior here.
We've been traveling full-time in the USA and Mexico for the past seven years, working full-time.