Kevin, i'm not entirely sure what you mean by micro-business. One idea that seems feasible in my neighborhood structure would be to have a commercial hub (which we do) that contains many spaces where start-ups and home type businesses could thrive instead of actually having them in your home and having to deal with zoning, etc. This would mean cheap rent ($100-$200 a month) and the ability to test their ideas for relatively inexpensively. Ideally these would be tiny stand alone buildings with a central space.
I agree with your overall premise, Strong Families, Strong Homes and Strong Neighborhoods create Strong Towns!