If using a glass tank for rodents: one of their hobbies is chewing thru the silicone in the corners...just so you know. And you'll have to hang a water bottle in
there, which is then vulnerable to being chewed thru, and which (I guarantee!) will be scent-marked (pee'd on). Just not a fun way to raise them...& a hassle
to dump out for cleaning.
About raising most mice to adult size: the males fight & sometimes kill each other (& they also make the most odor, to impress the females). In a communal
cage, they'll be fighting all the time if there's more than one adult male.