I really wish you all the best with your plans to home "unschool" your kids, Harold. I have considered this route myself many times, but the reasons I have opted not to go this route are:
sport - you and I have had conversations about this before, and I know we differ. I really want my kids to have the opportunity to participate in competitive team sports
money - our immigration to the UK set us back several years in economic terms, and we can ill afford to lose my income if we are to meet our commitments
but most importantly...
my shortcomings - I am a talented teacher (if I say so myself) but I really suck at it with my own kids. With them I am impatient and intolerant. I so want them to shine at everything that am incapable of allowing them the space to fail.

I also have to agree with Marco Polo's comment when he says that "using new information technologies (or at least computers) does not per se automatically generate good teaching and learning". Good teachers are good teachers with or without technology and poor teaching is not improved by the introduction of technology - your son's poster project is a case in point (and I have some experience of this poster obsession myself, all the way across the pond, here)