i've been breeding for well over a decade. even did the seed site thing a few times, and got screwed by quite a few people, including some on this site. i was BANNED for discussing my strains and projects. in more than ten years i have stabilized 4 original strains, and have a few more projects still in the works. this shit is NOT done overnight, and all crosses must be tested before you can even THINK about selling anything. this x that is not always going to give you a great cross, in fact usually crosses don't work out for one reason or another, and you the breeder end up starting all over, back to the drawing board.
as for rooms, you have veg and flower. when working your lines you rotate males, and keep multiple females. ie, if i was to make a new cross, i'd have gdp, ak47, norther lights, etc flowering, and one sour diesel male in veg. males will auto flower in 24 hour lighting, so you just be patient and wait. once the male is about to drop all his gunk, pick up the plant and gently thwap all your females with him, and turn a fan on (done at week 4 of flower). then wait 8-10 more weeks to harvest seeds.
imo, if you're only going to post to knock someone's reply, know who the fuck you're talking to first.