Plastic racks are cute, but they're way overpriced compared to the time and materials put into them.. Buy yourself a table saw, a good drill, and some plywood.. Practice a bit, if the first doesn't look so pretty, move on to the next one, it'll turn out better.. Before you know it, you'll be a professional cage builder with your own innovations.. You should be able to practice and get to the point of mastering with the amount of money you'll spend on 1 rack comparable to the size you're building.. I never touched a power tool in my life and the first cages I built weren't so bad.. If you can use a tape measuer and do a little math, you shouldn't have a problem..
Here's an unfinished picture of the last thing I built, the top is for an adult iguana, the bottom holds a 72x36x18" Vision.. A lot nicer compared to my first attempts.

BTW, I'm building a rack for those bins at this very moment, Freedom Breeder style, you can pull them out on rails.
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Joe Lydon