I actually have my bp and adult corn racks set up exactly like that though it isn't because I can't afford standard racks or build them. Personally, I live in a situation where my hubby doesn't want anything to do with my snakes and that includes helping me move their furniture. With that style, I can move, rearrange, etc. as I please along with the added bonus of when I take my snakes places (they travel with me to my parents and to educational seminars), they just go in their tubs with no switching or bagging necessary. The only real downsides I find to this style are that the heat isn't as efficient because it isn't enclosed and you must have hides for them. Other than that, they are wonderful!

Here's a pic of my juvie bp rack that I took today for someone who was curious about them earlier.