Really? Some other parent is going to go to college at least half time as a matriculated student to reduce the college costs for that parent…maybe?
Remember…colleges that don’t meet full need for all might not care one bit about an additional student in college when it comes to awarding need based financial aid. When our second kid enrolled in college, our first kid got $250 more merit aid and no need based aid. His EFC was $22,000 less.
Your college son isn’t going to benefit from any parent enrolling in college. Your wife MIGHT get some additional aid when the son enrolls. No guarantee of that! And no guarantee of additional aid if you enroll.