I keep Diamonds in brissie- they do fine- I just have a large enclosure aout 4 ft x 4 ft I think it is- a big square one with UV and heat lamps (infra red) . They have lots of platforms and perches in that one-
underneath I have a seperate enclosure which fits the width of the top one perfectly- but is only 60 cm high- this one has a hide box, no heat, no artificial light, and a large water bowl.
So I drilled a 15 cm hole through the floor of the top into the roof of the bottom one- joined it with a thick piece of pipe, and they can just cruise between the two- they both love it. There is a massive gradient between the two, and I only put the heat on for a couple of hours in the morning for them during Summer, as it is 30-40 here as you know ... I put it on after a feed too so they can digest a little better- apart from that the natural gradient works wonders for them- they dont ever refuse a feed and they are pretty active unlike alot of the Southern varieties- plus picking the Male up from Pythons73 didnt hurt- he is a machine !!!
I will try and get some pics up on my profile and PM you if you are considering setting something up. Diaomonds are my favourite of all our snakes- i watch them lots more than the Albinos
Remember, Diamonds are pretty hardy and there are natural integrades up this far- i rescued one with a busted tail a year ago, fed him and healed him and sent him on his way, and he was a VERY large lad at 8 to 10 ft- even with half a tail- and lots of scars from trying to eat Possums- he had been living in my roof in the city (paddo) for a while judging by the amount of skin hanging up there.