We unschooled K - 12 also. Public/private schools were referred to as “institutional schools” or “brick and mortar schools” the few times we talked about them. (That wasn’t meant to be negative, just descriptive.) Our kids were asked each January if they wanted to continue unschooling or go to one of the local schools the next fall. Private schools held open houses in February, so we needed to make that decision early in the year. The kids attended various summer camps and workshops at private schools and each had a preference should we ever have to stop unschooling, but none opted to attend during the school year.
We used very few textbooks, with the exception of math textbooks and even those weren’t used much until our kids were teens. There were lots of “edutainment” type computer programs and I spent a small fortune on them. We made good use of our libraries and spent as much on books as on software.
About age 12 or 13, I showed my kids the requirements for them to get into various colleges. Over time they decided that an undergrad degree would be the minimum required for their career goals and they did what was needed for admission.
Our kids were self-regulating when it came to gaming time. Maybe we were just lucky. I talked a bit about personal finance, life in the “real world” and how they’d have to be self-supporting as adults. The standard of living they achieved was up to them. Yes, that’s simplistic and not entirely accurate, but it worked.