I use commercial pvc cages,
and have my own custom built racks built of bullet-proof oak hardwood cabinet grade ply boards sanded and sealed with water proof deck paint.
Pricey? Yes!, in the short term. But I want enclosures that will endure as long as my pythons! For decades. Saves money in the long run to build it right the first time.
Melamine works fine for awhile, until it gets chipped, gets wet, or warps, degrades... yuck