If CSU is on the table, you will find considerably lower board, and I assume, training rates around Wellington and Fort Collins. Granted I don’t think those are programs that will attend the shows that you’re wanting. But if you are willing to haul out for lessons, that opens up some opportunities in terms of boarding facilities. You will find more open areas and turn out up north. Though I can’t help with how far some of these programs are from the Fort Collins area.
I agree that Elisebeth Hare would be a great option for the breeding aspect and she also does a very nice job with young horses. She’s few miles off i25 at Dacono, for routing/GPS purposes.