All that said what I would really recommend is to check with friends/neighbors with smart phones and see if the nearest verizon tower is putting out 4G signal. You said nearest cell signal is 7 miles. I have saved several marriages here on the coast by installing a cell phone signal booster. That will do two things .. well three. Improve voice quality, improve MiFi speed and save your marriage.

I'm thinking you will have higher speed and no connection issues if you can get 4g even if you have to boost it.
Seriously .. go to
CellReception.com and enter the city nearest you that has coverage. If there is a tower within 20 miles there is a good possibility you can boost the signal. If you have 4g even better. I would trade my Exede for 4g in a heart beat.
Cradlepoint is the best router I have used to establish WiFi in a home using a USB stick modem to connect to the internet. PM me if you want a reference for equipment.