Wow, that is awesome
Wish I was handy, lol
It's not really difficult...
I can give you my designs. Just finished building my own, it's not hard at all (I never design or worked with wood before).
Briefly, I just walked into a pet shop, saw how Reptile One build their Saburra 120 and went home and designed my own!
Saburra comes in 4 different sizes; 1 vertical for arboreal snakes and 1 other design, but 3 different sizes for terrestrial snakes/skinks etc. 60, 90 and 120 cm.
Did research the materials and slightly adjusted the size of enclosure accordingly to materials sold at Bunnings (Masters, Mitre 10 etc.)
All material came to less than $125 (less the glass doors).
Reptile One enclosures are made in Asia, of Melamine MDF. It doesn't exist in Oz, so I bought normal white Melamine (chipboard) got it cut to size and the rest is easy.
The tricky part for me, were the hinges (even Reptile One went for a cheap nasty hinge option with their latest designs)...
After a couple attempts, I went with a PIANO HINGE, which you can get it cut to size, approx. $22-$24.
The 2x 5mm sliding glass doors, tempered and cut to size was the next big expense (the same as a 5mm sheet of perspex, uncut) approx. $30.
The next big expense was the plastic tracks for the sliding glass doors... approx. $22-25.
Then the light/heat fittings if you don't already have them (which I do).
So, my whole 4ft enclosure looks exactly like the Saburra 120 and it costs less than $200!! Instead of the SALE retail price of $250 for the black one and $300 for the Beech one. – But the full retail price is approx. $450 or so!!
(Plus, I was not 'forced' to buy a black enclosure as Saburra no longer comes in Beech colour.
Hope this helps.
P.S. – You should try to have the vents on both side panels, to create air flow.
One closer to the top and the other closer to the bottom and closer to the front/glass doors so there's no draft at the back, where hides are.
The reason for this: HOT AIR RISES and snakes don't like drafts! READ ATTACHED graphics.