Ive been wanting to upgrade from a tank to some sort of rack for awhile but the ones ive seen online are too expensive. I would like to have one that has room for 4 tubs but i want it to be 2 tubs wide and 2 tubs tall. It would need to be big enough for my Adult Female Normal and im buying another BP soon. What would be good materials to build it out of? Where could i get everything i need? How much would it cost? Or is there a design thats been posted on here that is like what i want?