I'm new to drones/UAVs, but I'm looking to learn. It seems to be quite expensive to start, but I'm very interested. If I buy the ArduCopter 3DR kit, will I need to buy any other parts to build a working drone? Is there a cheaper/better way for a newbie to start? Would it be cheaper to buy the parts separately? Is there a guide to buying and building from parts? Thanks for any help!