Most burms will outgrow a 6x2x2 cage, many burms reach 14' - 16' (and can exceed 20' though this is not common) and a 6x2x2 can only house something up to 10'. But also, if you get a baby burm you cannot house it in an adult sized enclosure or it will get stressed (and probably lost
). So you need to graduate sizes.
You're best bet is to build you own for enclosures like that. I can't help too much, I'm not extraordianrily handy when it comes to building things
LOL...but Jeff is the man for caging around here. Don't know of anyone that can build great cages in such short timespan for minimal $$