I recommend going with an Animal Plastics enclosure. AP cages offer special lock with a key for their enclosure so your husband can be reassured that the BPs wont escape.
I like them over other cages because they're aesthetically more pleasing to me and are a decent price. The only negative thing about AP cages is the shipping can take 2-3 weeks. Other than that, it's probably the best investment I made for my snakes.
By the way, AP sells dividers for their cages just in case you decide to split one enclosure for two snakesJust a thought...
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