For 4 snakes, I doubt it would be worth it...I breed my own rats, it's not as bad as many make it out to be(the smell and work), but it's no picnic either. I do save a decent amount of money though I'm not breeding a ton of them. Unless you have somewhere you are positive you can unload extra rats off to, even 1.2 will far exceed your needs for 4 snakes.