I tried searching, but I couldn't find a definite answer, so sorry if this is a repeat question. Anyways, I really want to build my own racks, but I honestly am confused about what size tubs I should get, and more importantly, where to find them.

I really want to widen my collection of snakes from just Colubridae, to pythons and boas. However, I like my animals to be comfortable, but from what I hear, I need to six feet long tubs. On the other hand, I see almost all of the racks here being pretty small in comparison.

Also, what type of wood should I get?

Thanks

P.S. I'm on a budget