Some adult size cage questions....

[mr.spooky]

Once they are larger and established, they tend not to mind a little leg room. If space is no issue to you, a 4x2 is pretty much the max you should need for an adult blood . Females generally get larger, but that rule is not solid. I would provide the male with a similar enclosure. Temp gradients come big into play when breeding as females will thermoregulate according to their cycle, so an enclosure large enough to accomplish this is crucial for egg production. Take a careful look at the price of a DIY build. You may find that it may cost just as much as an animal plastics T-8 or a boaphile 422

a BIG +1
i use the animal plastics T10. very good price, holds great humidity, and will last a lifetime. it sounds like your comfy with the diy idea,, so if it be me, id get 2 t10's/ t8's, and as your puting one of them together, just insert a piece of aaaaaa cant think of whats called,,,,,,,,the boards you make racks out of,, anyway,, put a piece of that in there, caulk it in, and use it as a particion. that way when he gets bigger, you can just take the piece out and youll already have a matching cage. these are stackable BTW...
spooky