It sounds like you've found a loophole to make it happen, but why do you want to? Your teammates would all be a decade younger. A 30-year-old needs to train differently than a 20-year-old, and your program would be designed for the 20 somethings. That's also a huge social-emotional gap. Finally, college coaching relationships are frequently pseudo-parental, or somewhat dictatorial, which would be a weird dynamic to have to navigate as an adult. If all of that sounds tolerable, reach out to the schools you're interested in.