I started cobbling this together a few weeks ago when I needed a way to make thin strips of wood. A planer will only go so far before the wood starts shattering. And then there is the cost factor.
Many wood workers have noted that a surface planer can be bought new for about $350. But a similar size sander STARTS at about $1000 - $1200. Eventually I expect I'll need something that will do more than what my jig - which uses my existing belt sander will do. But I'll cross that bridge when I come to it.