I agree with Hillbillyherbs, you can totally do this yourself, and it's pretty fun. I'd kill for a greenhouse and an acre! Lucky you! When I first started out, I studied the 2 page cheat sheet from
www.growweedeasy.com, and the plants did the rest. I googled A LOT, too. I used soil (not coco coir) and some cheapie little cfls (The Phillips grow light is about 7 bucks). No, it was not an amazing 1 lb per plant grow, more like 1/4 - 1/2 ounce per plant, but I grew it myself, had a lot of fun, and learned a lot.
Start off small, and cheap, and see what you can make happen. $10-$20 seems to be average donation to get clones around here. If you learn how to clone, (again, it's pretty easy) you can make that initial plant investment last a long time.
My other advice: Make sure you google your question, and read thru the rookie growing threads BEFORE posting a question. Asking bonehead questions when there's an entire thread on the topic tends to make forum members cranky! (I am not implying BY ANY MEANS that your question was a bonehead one). They also get cranky with a guy named "infay-aggieshay". I had to say it in Pig Latin, so I wouldn't release any Beetlegeuse Bad Juju. I don't know what's up with all that, but boy howdy, the group gets pretty unruly when he posts something!
Good luck, and keep us posted. If you're coming over the mountain to Eug, give a holler!