It can definitely be done, but from reading and my own experience, it is easier to buy the wood and build something and trim it out to look nice. I spent a lot of time last summer going to garage sales trying to find a dresser that would be suitable. Most dressers and suitable furniture are not 2ft deep so that can be an issue and many are much taller than needed causing you to need to use extra electricity to heat unused space.
I plan on building my own soon so I can have a nice viv stack as opposed to the drab white melamine enclosure he currently lives in. This should help convince the wife to allow me to assemble my blue tongue army.
You can look up the Crossfire Enclosure plans online. The Crossfire site has a great tutorial for a basic 4x2x2 enclosure. There are several other designs/tutorials that are essentially the same. If you use oak or birch and trim it instead of leaving it plain, you should be able to make a really nice looking furniture quality enclosure. You can stain/seal the outside to mach your room and then design the inside to fit the design you have in mind. You'll just want to make sure you seal the inside including the seams very well to prevent water damage. I am probably going to use a couple of coats of drylock, caulk the corners, and they possibley tile the walls with either ceramic tile or cork bark panels. I am aiming for something more like 6ft long x2ft deep x 18inches tall to provide plent of space for roaming, hides, etc.. I should be able to do this with 3 4'x8' sheets of 3/4" Oak/Birch plywood and just a few pieces of trim.
Make sure to share your progress once you get a start on whatever route you take!
or 
) something like this but in a square and shorter in height. Would it be able to work out?
