Cages Phase 1- sizes

[asphyxia]

I am starting to research my caging options. I want a wall unit type 2-3 units high so, thinking of some short and long term planning I wish to house the following;

1 Male and female BCI together year round (can I), if so what is the Ideal cage size,
If not what are the ideal seperate sizes?

2.Same as above but for ball pythons

3 Same for corn snakes

4 in addition i will have my leos in a set up

5 Giant german bearded dragons breeding pair (To Come), Does anyone know where I can optain them)

6 Black throat...Under controll so far, thanks to Dom

I really hope this make sense, (its clear as a bell inside my head)

Thanks
Brian