The solution to your problem seems simple. You are seeking the best way to individualize your son's wrestling career. I think you could easily travel to national tournaments at your own expense and you could also pick up opportunities at tournaments where home-school kids and private school kids compete. I don't think anyone would begrudge you in your efforts here. I think Alex Thomas pursued this option for the early years of his high school career.
It appears that you are seeking the best of both worlds in this argument. You are hoping to reap the benefits associated with the state tournament series provided to you by KSHSAA and its member schools. I'm certain the state championship looks good on a resume when seeking scholarships. I understand the desire to compete nationally. Tennis players, swimmers, gymnists, etc. have the opportunity to compete on the national level but they often lose the ability to compete in state sponsored events.
What I've found in coaching wrestling, is that you can't wrestle by yourself. Meaning, you need training partners. The team often provides quality partners, adequate if not exceptional coaching, and multiple opportunities to compete. The team also provides support and friendship which makes the travel, tournaments, and down time much more entertaining.
Finally, I know a few college coaches and they've told me that it is difficult to recruit and watch kids during the season because they are so busy with their schedules. I've been told that many recruit heavily at Fargo and Senior nationals. Please take note that I didn't say solely and all coaches recruit this way.
I don't support everything KSHSAA does and I'm not drinking the kool aid. I'm also not a communist and I think my freedoms are intact as long as I'm not attempting to bypass the TSA. However, KSHSAA serves as a governing body with rules and regulations designed to protect the interests of all stakeholders. I'm certain it is quite difficult to please all of us.