Thanks for the tips Yoshi. Another few I might add.
Expect to pay twice what you think you will.
Try to use as many off the shelf items as possible. (getting parts from NAPA or AUTOZONE is a lot easier than waiting on custom parts)
The best engineered buggy in the world CANNOT protect you head or body completely/properly....keep a few hundred bucks in reserve for good safety equipment such as a helmet and harness...don't skimp on quality here....Ask me how I know
HAVE FUN! Building buggies is just a means to an end. If you don't have fun with the build you are wasting your time.