keeping pairs together year round

[Lrptls]

i would really like to get into breeding reptiles, i already have the animals i want to breed-some i already have pairs for but most still need a mate. i dont want to mix species and definetly wont mix males but is it safe to keep a male and female together year round? i would really like to do that to save space, if i have to keep them seperate until mating time then i will.

heres a list of the reptiles i want to breed, if any one can tell me what i can keep together year round and what i shouldn't that would be great. it would be awesome if you could add the best sized cage for the pair. thanks alot for any help.

colombian red tail boas, ball pythons, western hognose snakes, leopard geckos, bearded dragons, maybe chinese water dragons (i think my male is too agresive though?)