I went out of state for university. But I do live in the ND/MN region and I can tell you I know an entire community of NDSU computer science students who graduated and now make over 6 figures. Sure they say it wasn't amazing, but it got the job done for really cheap. Also NDSU is only 7k per year in state before assistance. No idea where you are getting the 20k figure from.

You'd probably have access to a better education at U of M in Minneapolis. But it's going to be quite a bit more expensive and I'm not sure it would have that large effect on your career.