Calm down and take a breather. We're just offering advice, nobody is trying to force you to do anything. Nor is anybody questioning your experience in keeping snakes.
I personally don't like glass for several reasons, nor would I ever modify anything glass, but that's me. They do have awesome cages like the T8, which are well under $300. Here's a link if you would like to check them out: http://www.apcages.com/home/terrestrial/T8/T8.htm
If you are going to modify the tank, good luck and post pictures when it's done. I just wanted to chime in and add my input.