Holodactylus africnus is a rarely acclimated gecko.
I worked with a pair last year. The major difficulty is to feed them. They are termites eaters but in a captive environnment, you could feed them of crickets with brocken legs, or that have been frozen 10 min in the fridge before. I hand feed them regularly, and they were able to eat large roaches !
Most people use sand, where geckos could burrow. But I first use paper towel with an hidden humid box ( with sand) and it works good. I use a lot of hidden areas. This gecko seems to be very sensitive to deshydratation.
H.africanus as been bred in US, according to R.Tremper and P.de Vosjoli .
There is very few litterature and infos available on this specie, Try to find field guide