From the web-page of the breeder I'm engaged with:
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Blackheads are very easily housed in captivity. Babies can be started in the commonly seen tub rack systems. All they need is a thermal gradient (80 cool end/ 90 warm end), a suitable substrate, and a water bowl and they will thrive. As they grow, our juveniles are progressively stepped through larger and larger tubs until 4 to 5 feet long. At this point they can be moved into their permanent enclosures. An enclosure with 4 feet by 2 feet of floor space is suitable for adult males. The larger females will benefit from a roomy 6 feet by 2 or 2 ½ feet of floor area. Adults should also be given a wider thermal gradient than offered to juveniles. A basking spot of up to 95 degrees and a cool end temperature down to 80 degrees is ideal. Adult Blackheads greatly appreciate top entry hide boxes, giving the sense of a subterranean burrow.
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He co-wrote the June Reptiles Magazine article that helped me decide to pull the trigger.

More data can be seen on his operation and general BHP care at:
www.splitrockreptiles.com

Sign me - patiently waiting