You can run them 24hrs if you want but they don't really need all that circulation wen the lights are off mabe you could run only one for circulation wen their sleeping
The two fans will stir the air around but u mabe wanna leave the door cracked 2 get sum fresh air in there wen the lights are one 2 prevent heating issues but u shud be fine with tha door closed &| lights off
The oscillating fan should be good enough circulation in tha closet along with tha desk fan fresh air will get in there no matter what as for tha odor u can try mabe growing some herbs like basil or something along side the weed 2 hide the smell..jus a suggestion
Yea they'll go into shock for a lil while mabe a couple days to a week then take off &| the wood should provide enough drainage in the pot &| allow O2 to the roots...give em a small dose of nutes 2 help with tha shock