I have a great deal of sympathy with this. There's so many beautiful low cost of living/low cost of real estate locations in the US and Canadian west, but the best locations are also places where you're looking at no Internet, off-grid solar/wind power, etc.

Depending on where you are looking, and what your budget is, and your level of motivation you might look into seeing how difficult it would be to build your own point to point link back to a place where you can get 'real' internet.

I also want symmetric gigabit but in a very rural location I might be totally satisfied with 40 Mbps down x 15 Mbps up, if it was sufficiently reliable and good quality (overall uptime in a year, latency, jitter, etc).

There is a great deal that can be done with sets of equipment like a 90cm high performance dual polarity shielded dish (ALG or Jirous or similar), ubnt AF5XHD radios, etc. Perhaps for less than $10k all-in you might be able to build your own link to reach the nearest WISP or terrestrial connectivity. Entirely depending on how remote you are and terrain.

I've thought about this as well. It would cost more, but I could get a really small house at the edge of a city, set up a Ubiquity tower, maybe licensed, and have my own radio link. I managed these links in the military and bad weather aside, they were decent. I too would be ok with 40/15 myself, but family members need more. I might catch some flak for putting up a small tower. I would like to avoid the commercial wireless solutions so that I could have more control over jitter/latency.