I really appreciate all of the comments/suggestions. I am "senior" who only carries a pre-paid cell phone for emergencies. I tell you this so you know that I am NOT up-to-date when it comes to cell phones, plans available, and technology in general.
So, I now know more what I can do when we do start travelling. Being retired, I don't have to have internet everyday. Besides not being technical, I am also not rich. That means that I don't want to spend a lot of money and buy equipment that I won't know how to use or install.
Right now, I stream/download everything through my computer, and then watch via hdmi cable on my 75" Sony 4k tv.
Everyday, I am downloading movies/shows (mostly tv shows). For us, the internet has made the whole world available to us. We watch shows/movies for all over the world-Korea, Japan, Germany, Russia, Australia, England, and Thailand to name a few. We don't mind reading subtitles.
I don't keep track of my usage, but recently saw that I downloaded about 20 gigs, which was a slow day, and I am sure that I occasionally download a 100 gigs a day.
I have probably 12 TB on external hard drives saved up, which sounds like a lot, but probably 60% or more we won't like and will just delete.
When we start traveling, I won't be able to continue as I usually do, but we won't have to worry about not having anything to watch.
We are planning on taking 1-3 months trips, and then return home for a month or so.
I will find one of the better "unlimited" plans at the best price, and then I will just have to play catch-up on downloading when we are at home.
Again, thanks everyone for helping me get more current with what is available.