If you are researching hotspot system the first place I would start is https://www.rvmobileinternet.com/
. They have so many videos on what to chose and what are the currently the best systems for various needs. These videos are free for you to view.
In this thread I have found a lot of good information but is conflicting so, in the end, you will have to make a decision that fits your online style and budget. We are with Verizon and have been so for the past 8 years. We have very few complaints with Verizon except they do not do a good job about meeting excessive peak bandwidth demands for
RV Parks that totally trunk out the system, e.g. Rainbows End and Rainbow Plantation Escapees. These two parks have internet access that slows to a crawl but we can almost always stream Netflix. We use a huge amount of data each month streaming videos.
I would check out Visible (by Verizon ). You are limited to 5mbps down but you can stream Netflix and it is unlimited data for $40/month. T-Mobile has some attractive plans right now ( see the link above for details). ATT is starting to have some attractive plans too. Do not get too caught up in 5G unless you are close in Urban where they are deploying the infrastructure.
We have a WeBoost signal amplifier but rarely do we need to deploy it to get high speed data. Check out the link above (Mobile Internet Resource Center) for info on MIMO info into MiFi and Cellular Phone hotspots. WeBoost is not MIMO so you get one antenna, whereas, MiFi and Cellular hotspots is MIMO and have 4 antennas or more.
This is a very complex subject and most service provider tier 1 sales/ techncians cannot prove reliable decision making information. Cheers & best to you.