I've had many pythons and colubrids before, but never a boa. I love the way Kenyan Sand Boas look and was hoping for some wisdom through experience.

I've heard that you can use the finely shredded aspen as a substrate, but what is the best? I would want him/her to have the best environment.
What is the appropriate adult tank size? Do they do better in racks like bp's?
Temperature(hot spot/ambient) and humidity?
Any and all information and suggestions would be greatly appreciated. Thanks boa-fans