bin set ups for reptiles and how to make them?

[kala83]

so I went out to a local event that the local herpetology society for the University of Missouri was at.
Like last October, and one of the guys there was mentioning to me how if I wanted to look at getting a Blue Tongued skink, and some snakes mostly a corn snake and a new ball python again in the future.

that doing bin cages is a good way to have them have enclosure and it can be a bit less cost effective then going out and getting a glass tank. (not personally that I am opposed to using these)

but I was wondering where can someone find instructions on how to make these.

or maybe I could just get feed back on here for the dimensions on how big I should look at if I wanted to use them for the types of reptiles I mentioned above.