My bro lives out west ---- they took a public school 11 and 12th grade and pushed the kids to EWU to finish hs/start college. EWU tuition is similar to NDSU--- tax savings per kid vs public schools was over 10k a kid per year. Kids only had 2 or less years and they were rady to get into the work force.
Kids that are lucky enough to live close to a college town can combine HS and college classes here in ND and save a lot of money. Or now days, maybe even with remote learning.
Both our boys took college classes during their senior year of HS. Worth checking out if it's something your kids might want to do. It sure gives them a head start when they start college.