hi,
i keep my coastals in a 4x2x2 foot enclosure, mine are around 6 foot long and are very happy, i tryed the high enclosures (old cloths cupboard) and my male refused to even come out of his hide box, i left him for about 6 weeks and he didn't eat or drink , i moved him back into his cage that was 4x2x2 and he spent about 5 minites drinking and the next hour climbing over it and then spent the next few hours hanging on his log, i put his rat in and he took it straight away, so anybody that says a coastal isn't happy unless he has a high cage isn't always right, it all depends on the individual snake, just also to add he was so upset at being in his low enclosure that he bred last season to 3 different females with all 3 producing hatchlings,
but thats just my opinion and i'm sticking to it,
cheers,
steve.................