Greg - 4/24/2012 11:17 AM
For a scuba diving rig, it would only need legs that could go to around 80 feet. Deeper than that and your outside safe recreational diving limits. So that should shave off a few million.
A rig like this would either need research/government funding OR have some other way to make a lot of money to make it a viable solution for venture capitalists. Or a wealthy philanthropist that loves diving can toss us a bone.