Buy an island where no one is going to come along and steal your huge crop and/or arrest you.

That being said, prepare your soil immediately. Look out for signs that fishermen frequent the spot. Buy a roll of duct tape and use it liberally over the lower half of your face. Large plots means a bigger blip on the infrared scanner should you be in the range of the choppers. And don't talk about being all big and bad and connected on the internet. Seriously. DEA magnet anyone? Re-read the part about the duct tape. It's like the Force. It has a light side, and a dark side, and it holds the Universe together.