I have a cousin in a very isolated area with no cell service indoors or out. He got the (sorry don't recall the name) service that makes his house a very small cell and (IIRC) VOIPs his cell calls over the internet.
Unfortunately, it is not compatible with his Hughes satellite internet, HOWEVER, text messages work just fine, and it's only voices that don't work over the Hughes connection. He still gets the caller ID info on incoming calls, and then just landlines them back.
He can't get DSL at his location, and the only internet option is Hughes. He is satisfied with this arrangement, before, he had to drive 1/2 mile to get to a hilltop where the cell worked.
Not saying this is the answer for the OP, but anyone else looking over the thread might consider if this system would be 'good enough' if they are in an isolated (but STUNNINGLY beautiful) valley far from civilization.
Back in NTSC days, he had 3 VHF channels, when the nation went digital, he lost all OTA. He was pretty happy to get DirecTV.