Any "Real" Unlimited Plans?

"we probably stream/download 50 gigs a DAY"

Are you sure? I don't think any carrier will want you as a private party "normal" customer.

Could you explain what you do to stream that amount of data and where you are getting the information about usage?
If you truly use that much you are NOT going to be happy trying to duplicate that ability while on the road.

We use visible and it is 'unlimited' to the extent we use it, maybe 40GB tho usually closer to 30. So if you want 140GB I'm not sure how that will work. Visible is a Verizon spin off and in our 10,000 mile loop out to Idaho and back via ND, SD, NE and KS to FL we only did not have a signal maybe 2 times at the campsite. And we boondocked. You could get two visible phones to double your bandwidth. $40/mo flat tho you can cut that to $25 with a sharing plan.

At that usage rate I don't think you will find any plans that fit your needs unless you go to a commercial plan that will cost big $$$$ per month. Sprint is the only carrier currently offering "unlimited" "UN-throttled" plans but about the second month of that kind of usage they will cancel your service.

50 gig per day?

That's crazy high, around 1,500 gig per month?

Your going to pay a crazy amount per month IF you can find a wireless provider that will be willing to give 1.5TB or higher limits per month.

No, Cell wireless Internet is not really "unlimited" per say, they won't stop you from using it but they WILL "throttle" you down to dial up speeds after you reach the agreement threshhold.. And I suspect you won't be happy with 53Kb-128kb throttle speeds.

Might want to rethink your streaming usage, you may need to force streaming to SD 480i instead of HD video. Find OTHER ways to entertain yourself like buying or renting DVDs.. Don't depend on campgrounds wifi, they are often over congested and weak which makes streaming pretty much worthless.