You do have a couple of option, although not cheap or good.
I went through this when I moved in where I am now.
Hughesnet offers two-way satellite service. Download rates are awesome, service is $70+ a month. The downside is that they have a two year contract (with $$$ ETF), and a data cap of 20 GB (which is applied DAILY).
The funny (sad) thing is you have a 30 day grace period to get out of your contract, and in that 30 days , they don't throttle you for exceeding your DAILY data cap.
They want to wait until they lock you in before making you unhappy! And the bad news is buried on their website, lots luck finding it.
Fortunately for me, DSL came to my house. Download rates suck (2.5 MB/sec), but cheaper with no cap.
Looking at Hughesnet now, looks like their prices have dropped and caps have gone up (10, 20, 30, 40 GB for $50, 60, 80, 130).
Another option is VIASat. Apparently they are rolling out a new "unlimited" service (with a 150 GB cap) for $70. You might want to check it out:
http://www.engadget.com/2014/08/12/viasat-unlimited-plan/
Neither of those things works for the way my family uses the internet. I recommend you use the function of your router that tracks data usage if you go that route to see if either is viable.
Also, call a round and verify DSL isn't available. When I moved in here, all my neighbors said hughes was the only choice. A few phone calls later, and I found out the century link now had (crappy) DSL available in my neighborhood.
Back OT: be careful about putting all your eggs in this basket.
iPad with LTE is great if you want to watch movies, etc on the iPad. But there are reports that ATT is starting to throttle grandfathered unlimited plans... exceed 5GB and get throttled to 768kb/sec.... no more movies for you at that rate!
ATT also monitors accounts for unauthorized tethering. And if you move the mini sim to another device, they monitor for use of invalid IMEI/MEID, and will tell you to stop what you are doing or lose your unlimited plan.