We are full timers, and we use a Verizon jetpack for our internet connection. We are using the FMCA Verizon plan, so we get 25GB/mo for $50. The plan is marketed as unlimited, but it's not. It's 25GB, then if we go over that, it drops down to text only speed. (But you get to use as much text only speed as you want!!!)
Still, 25GB for $50 is not a bad deal. Then, we also have phones with Consumer Cellular. Our phones have sim cards that connect over the AT&T network, so we usually have at least one source of internet connection no matter where we happen to be.