Mine cost like $150 for the melamine and 7 41qt tubs. (I already had a power drill, bits, and screws).
The melamine costs $40 for a 4x8 sheet. I used 2. Then the tubs were like $8 a piece so thats another $60.
Youll also need a good tstat and flexwatt so thats like another at least $100 depending on what tstat you get