A quick look at their facebook page tells me they offer smaller enclosures such as a 16"/18"/20" and a 24"/16"/12" off the bat. Would those(particularly the latter) work to house a very young Sonoran(they'll like be hatched over mid to late summer, and I'd be getting on in September)? They do custom orders as well, which I could inquire about. 16" is a bit of a weird number...
And to explain my misgivings with starting with an extremely large cage- first and foremost, I've never worked with anything larger than a 20L snake wise. Jumping from that into a 4x2x2 PVC is pretty scary to me; I dont feel I personally have the experience necessary to even set up an enclosure that big and keep it regulated. I understand they're designed for snakes, but I've never heard of them until I joined this website. As I learn more, I'm sure I'll grow more prepared and comfortable with the size of it.