Here ya go D

You will need to following materials. The total cost per rack is ~$100.

2x4s
4x 48"
4x 23"
4x 21"

1x2s
10x 20"
10x 26.5"
10x 21"
10x 28"
5x 18.5"

5x 20"x28" 1/2" screen

1x 28qt sweater box

5x brass watering nipples

lots of screws and aquarium air line tubing