I was born and raised in ND, Bismarck in particular; and am now an ex-pat, so I finally feel qualified to answer a question on here.
What’s been mentioned above is correct, in terms of farming communities. The smaller ones are being bought out and the economies are drying up in those older towns. The ‘ghost towns’ are the ones that most people see and truly haven’t been inhabited for quite awhile.
I can only remember a handful of places that were really abandoned in my lifetime, 30 for the record, and it’s usually a slow decline.
Most of the towns lose the young people and the old ones just die off. The lack of jobs outside of farming in most of those places leads to the outmigration problem we have there. There are many communities of 100-200 or less than that. Most communities are an hour or two drive from the urban spots (Fargo, Grand Forks, Dickinson, Bismarck, etc.), so they can last for awhile. It’s not as ‘middle of nowhere’ as it used to be.
The railroads were set up on intervals of 30-50 miles, according to my grandpa who was a telegraph operator from 1949-1970. He moved around quite a bit to different depots. They’d bid on a location and take the contract for whatever the length was; he and my grandma and dad lived in the depot in town and that was that.
As for the land purchase plans mentioned, here’s a link to one couple that did it: http://www.bismarcktribune.com/news/state-and-regional/article_cc28bcda-1a87-11df-8d88-001cc4c03286.html
This is the same town where my dad is from and my grandpa still lives; I basically grew up there as well. Tiny population, everyone knows everyone else, etc. A new business will open once in a while, but just fall apart in a year or so. The difficult part is keeping people there and finding those who want to put up with a 45 minute commute (one way) to work there.
I would say the biggest problem though about new people coming up and living is the insular lifestyle and total distrust people have of anyone outside the midwest.
It’s not that they’re bad people or racist, I think it stems from the isolation so many of the older folks have grown up with and just a sense of sameness between everyone.