I use the reptibreeze cages, much better airflow through them IMO compared to exos but its all personal preference at the end of the day.
I have 2 reptibreezes - A large one for my female 46x46x92cm.
My male is in a 2x2x4ft Reptibreeze from Surrey Pet Supplies and was very cheap compared to other places - £77 I think it was. (but just checked and they have increased the prices : ( £91.94
Iv modified it slightly by adding some sheets of Twinwall polycarbonate sheets to the back and sides and siliconed them at the joints and to the base. cost me £30 for the sheets from B&Q. I drilled some very small holes in to the base in the centre over where the plant sits which then drains my misting water into a bucket underneath so I dont have to mop up all the excess any more as it was a nightmare at times, plus now I dont have to restrict the amount of misting, I can mist a whole spray bottle of water if I wanted. Iv also put some plastic fencing roll in there from B&M (£5.99) that fits perfectly to give the cham back something to grip onto now that the mesh is covered. plus its dead handy for tying things on to like branches etc.
To help with humidity I have one big umbrella plant that sits on the floor of the viv and that weights it down to help drain the water to the drainage holes, and 2 hanging baskets that I picked up in Morrisons for £2.49 each. I just have these hanging from the roof of the viv, by using a cable tie for each one that attaches to some bamboo canes laid across the corners of the roof frame of the viv so it doesnt put any strain on the mesh at all. The more live plants you have in there the better, as long as the humidity peaks 2-3 times a day the plants will help to keep the humidity up. And if you cover the sides and back that will increase it even more. I also use a dripper through out the day which the cham is always drinking from.
As for the temps, the room I keep my vivs in usually sits at a constant temp of around 70f so ambient is fine, I have a log placed in the viv near the top that the cham uses to bask and I just higher or lower it to get the basking spot between 85-90f. I dont bother with a thermostat at all, I have a 60w household spot light in an exo terra lamp holder clamped to the side of the viv angled towards the branch. Ambient temps at the top of the viv are around 75f.
Hope this helps.