After additional research (a lot of videos on the web), I've found that a "home built" stretcher works just as well as a "store bought" one. So it looks like two 2x4's at 8' and a couple of bolts will do the trick - that'll save several hundred dollars.
Also did some research on woven wire in fixed knot verses hinged joint. I was originally going to go with hinged joint, but after seeing the video I'm switching to the more expensive fixed knot. It looks like the fixed knot runs about $100 more per roll - and I need 6 rolls - but it appears to be MUCH stronger.
Video Link: http://youtu.be/Ez2ZW1YIjw8