Just got done reading this whole thread.... i like the advice @SilverLacedFarmChick gave you. Don't stress about what to buy, how many, what breeds, and what if you get roosters, etc.... that's alot of stress for just starting out on what's supposed to be a really fun adventure! just buy 3 or 4 pullets from a reputable place, maybe 1 or 2 different breeds. Start with a really nice small flock and grow from there. Why add the stress of wondering if you have a rooster and what to do with it if you do on top of starting to raise chickens and getting your parents on board with it.
Just my thoughts