If you make a transparent roof you'll have to start next year. If you plant outside you'll have to start next year. You can buy a generator, but all of that's pretty expensive, especially if you're looking to hook up some HID's.

You know what I would suggest? Wait. Wait and learn. Learn a lot. There's so much information for growers out there, and it'll all help you grow these amazing plants if you keep to it. Go down in the grow section and start looking around. When you're ready to grow, start asking questions. That's why I came to this site, and you have no idea how much help it's been.