1. Get t3i. Articulating screen is probably worth it alltogether. around 500$ usually.
2. buy a used rode mic. The standard one is plenty good. Should run you no more than 110ish
3. BUY A VINTAGE LENS setup. Go to KEH.com. Get a pentax 50mm f1.7 + EOS adapter. Should run you around 40-50 depending on shipping and all that. If you want a wider lens, like a 28mm or a 35mm, they should run you maybe 10-20$ more.
4. THEN deal with your glidecam setup. Which is totally up to you. But focus on getting the camera, mic, and lens setup before anything.
Have a nice day, Bluename.