I think there can be problems making one of these. From what I read, it can be difficult (or possibly as of lately impossible) to find the correct size of PVC for the "clamps".
I used one of the purchased frames to hand quilt the very first quilt I made -- when I was *much* younger and had a much stronger back! Even being younger, I found the leaning over to be not good at all for my back (even with the "lifters" that tilt the frame), and ended up donating this frame to a non-profit.
For hand quilting, I now much prefer this swivel-type lap hoop:
http://www.keepsakequilting.com/productdetail/9457.htm
BUT that is only a photo of the hoop. It looks like Keepsake isn't selling the hoop anymore. (The description is for a border add-on for the hoop. The hoop itself is more like $90.)