We recently have had to bite the bullet and purchase prepaid mobile broadband for use on the road. We have found that many RV places do not offer Wi-Fi. And even when it is offered, it is not useable, has low signal strength ...
I had to put my main laptop in the shop (the backlight went out). I'm now using a backup that pretty much has the same programming and can do the same things as my primary laptop. But I use a certain Web site to make online payments ...
You mentioned you used a Verizon tethered link. What is that? I am not a full-timer, so I can't see paying $60 a month to Verizon, my cell phone provider, for an Internet connection for my computer through my cell phone.