The U-sand gets close to the edges but you may still need the edge sander to clean things up. Adding the edge sander is not that big a deal. I re-did a porch floor and tried both the traditional drum sander and the U-Sand. Being a DYI-er as well I found the U-Sand much easier to get a good result.

Diane

A hand orbital sander will work fine. You'll only need it in the corners. The edges will be fine if you use shoe moulding. Buy extra sand paper!