Hmm. Let's play a game of logic. I am going to make one of two assumptions, and then I'm going to back them up with the logic that I used to make them.
1. You are not intelligent enough to succeed as a pot grower.
2. You are underage and therefore should not be on this site.
Now, let's just delve into the reasons why I know these things to be true.
First of all, you seem to be thinking that growing marijuana is an easy way to make some cash, cash which you most likely will spend on stupid crap or more marijuana. However, you clearly underestimate the costs involved in growing marijuana, even outside. As you are gorwing outside, you won't need to invest in lights, cooling, etc. However, if you "need to grow outside for security reasons," its a pretty logical guess to assume that you still live with your parents. If this is the case, where will you dry your crop? Where will you store it? If you grow 6 plants outside and aren't completely braindead, I'm going to assume you'll end up with at somewhere between 5 and 10 ounces, and from what I've seen, this is a low estimate. Are you going to be able to move that much product? If you do live with your parents, are you going to be able to hide that much weed? Hiding a quarter in your boxspring is one thing, hiding a half pound is entirely another. Are you comfortable with the legal risks you're about to undertake? I have no idea what the laws are where you live, but where I am, possession of over 100 grams (a little under 4 oz) becomes a pretty serious offense. That's just possession too - if you're going to be selling, you're in entirely new, much more dangerous, legal territory. Are you planning on selling to friends at school? Do you have ways around security? Around random drug checks and dogs? You do understand that selling within (can't remember the distance, think its 100 yards) of a school is, again, another step up in the illegality of what you're doing? What if your weed sucks? If you grow a bunch of brickweed, you're either going to have to sell extremely cheap or smoke a loooot of brickweed.
Honestly dude, I'm really not trying to discourage you from growing, provided that you are of age and understand what exactly you're getting yourself into, but it seems as though you'd almost HAVE to be underage if you're still a sophomore.
If you somehow are a legal adult, just read my post a few times, and understand that a LOT more planning has to go into this kind of thing than the amount you've apparently done. And unless you live in a state with very lenient marijuana laws, you're going to set yourself up for a whole lot of fines/ jail time if you're not extraordinarily careful. Which you clearly aren't so far.
tl;dr: You're probably underage, if so GTFO, if not, you really, really, REALLY, need to think and plan a LOT more before you try to take this kind of thing on. And DEFINITELY research the marijuana laws in your area, the best way to do this in my experience is to find the website for the NORML chapter in your state, they'll usually have a very clear explanation of the laws you need to know.
~Wiggles