I too one day want to get myself either Vision or Freedom Breeder racks. But right now they are just not in my budget. I can let you know that the rack I put together above does not sag, has stood up to the heating without issue (I set my Tstat to 98 degrees and have 4 inch heat tape cut to 3 foot sections on each level). My snakes all are doing quite well in my "cheap" setup.