For me, I like seeing my snakes, so everyone is currently in either Monster or Reptile Basics cages (black plastic with plexi doors). So cage, heat, and thermostat per animal runs $250-$300...give or take. These are pets, so I’m splurging. In the past, I’ve either set up in glass tanks or built cages for less than $100 per snake, but I really like the look and ease of cleaning that a plastic cage provides.