Ballast box is less than 2' long, whereas the blower is probably 5' long. But length isn't really my issue with maneuverability, it's the width. The blower is 70" wide, the ballast box is only maybe 30" wide. That makes a big difference when maneuvering between wood piles, etc.
I think mine was not much more than $150 new, but it was more than five years ago, so maybe I just don't remember. I drilled holes in the center of four 3" PVC caps, transferred those hole marks to the floor of my ballast box with a Sharpie marker, drilled and tapped each 1/4"-20. Then I cemented those caps to four lengths of 3" PVC tubing and bolted them down into the ballast box so they couldn't float out when I poured the concrete. Filled the box with mixed concrete, then after it was cured I removed those bolts from the ballast box, so the tubes each have a drain.
Things I would do differently, if I were to do it again:
1. I would have cut a hole in the back of the box and welded a hitch receiver into it. I cannot count the number of times I've wanted a hitch back there, but didn't feel like removing the box and retrieving my draw bar.
2. I would use sch.40 PVC instead of the sch.20 drain pipe I used. I've chipped the lighter stuff it a few times.