Materials (titanium tubing) were around $250. Some of that is shipping as I am not aware of a local titanium supplier.

Tools that I had to buy:
$50 drill bits (wouldn't buy these again as it isn't the best approach)
$20 dremel bits (much better than drill bits for making holes)
$100 pipe bender (platform homemade from scrap)
$50 MAP torch

I already had some nuts and bolts, drills, dremel tool, small bench vise, etc. A new bench vise might be nice though. Mine is small and not as sturdy as I would like for a task like this.

I guess overall I dropped around $500 just to see if I could do it. I don't so stuff like this everyday (smile).