As another said, eastern Montana could be brutal if its not something you are used to. There are extremely hot and extremely cold days (in the -30s degrees F) possible. It will be really windy and really brown (its very dry) for much of the year. You might also be shocked by how much some people drink/use other substances and how they get around when incapacitated. (There is no Lyft/Uber). There will not be a lot of young singles around, either.
I personally don't think there will be a big boom because of Starlink for housing. At the end of the day, internet is just a small factor in what makes a place desirable to live. Climate, distance to city/airport, local bars & restaurants, scenic beauty, and local activities all factor a lot, too.
Remember playing soccer with a guy from Montana. We were playing on a field in the Fall that was basically all dead, yellow grass. He used to say. "Dude, I'm from Montana, this is considered LUSH"
Good old prarie grass, green after it rains in June. Don't put a flame near or you'll start a wild fire brown the rest of the summer.
The state has the highest suicide rate in the nation.