Best shelves/racks for many tanks?

[GpBp]

Hello! I have three snakes (a baby bci, a baby ball, an adult ball), and two crested geckos (3yo and 8mo). I'm not planning on getting anything else any time soon. I'm wondering what you guys use to keep tanks on/what tanks, and/or what you'd recommend for my situation? Everyone is in glass tanks (10gal,20gal, and 40gal), but I'm planning on moving my bci to a T13 eventually and a T8 for the balls. I'm currently using this- https://www.homedepot.com/p/Edsal-60-in-H-x-36-in-W-x-18-in-D-4-Shelf-Steel-Commercial-Shelving-Unit-in-Gray-UR361860/100203714 Here's how I currently have the animals from top shelf to bottom shelf, left to right.



70qt tub on its side for crested gecko~~~~~~18x18x24 exo terra for crested gecko

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Small space with water, reptisafe, feeding tongs, etc.

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10gal tank for baby bci (temporary, she's very small)

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Guinea pig food/hay~~~~~~~~~~~~~~~~20gal tank for baby ball



So that's basically how my shelf is set up, and my adult ball is in a 40gal on a separate desk.

Requirements

• I don't need guinea pig food/hay on the shelf.
• I'd prefer to have all the reptiles together on same shelf.
• I'd like it to take up as little space as possible, as my room is pretty small and the guinea pigs cage takes up the majority of the room!
• Not too tall, wider is better.
• I'd very much prefer if geckos could stay in 18x18x24 (the gecko in the tub is too small to go into a 18x18x24, but I already have hers for when she grows into it).
• Cheap as possible!

Hope this isn't confusing, thank you!