Brisen had a great idea... I'm going to keep it in mind for myself if the situation arrises. I was also going to suggest explaining that because most homeschoolers don't actually spend all their time at home, the larger community (and beyond!) is really their school... bigger than any one building that's for sure!!
Since DS was a tot, I have gotten to know and spend time with a few homeschoolers. This year, I'm planning to become more involved with our local homeschool community. I do concern myself with his buddies who will be going off to school fall after next and want him to know and be comfortable with those of us who are choosing a different route. Different strokes for different folks and we're all just doing what we feel is best for our kids. I'm incredibly passionate about homeschooling, and its a decision that will include DS's input for sure, but in the end, I have to act in his best interests.
So I don't want to pull your post off topic, but I'm currently reading Hold On To Your Kids
(Neufeld), and it talks at length about "counterwill." I am finding more and more with my four year old, that the more I try to *talk up* something he has concerns about, the more he resists it. Not on principle or via being informed, but simply a psychological impulse to resist any sort of "pushing" on my part and that includes setting up a particular situation to be "better" such as in this case, homeschooling.
I imagine if this same situation arises for us, I will give DS a forum to air his thoughts, concerns, ask questions, etc., keep an open dialog going for awhile. Aside from answering questions, I'll probably keep my comments minimal and see if he doesn't arrive at the place where DH and I are, on his own.
We have some unschooling friends (our mentors I guess you could say), who set out to homeschool, but gave their son an option to choose at age 7 or 8 I believe. By the time that age rolled around they'd been doing the unschool thing awhile and their son had gotten to know both unschoolers and schooled children... he'd gathered enough information to know which of the two felt right to him. He's 10 now, and STILL happily unschooling.