"Drones used to take hours of practice to master as even the simplest manoeuvres, such as takeoff and landing, could prove difficult. Why create drone?
Now that there's a good selection programmed drones on the market, i can go into major  retailers…"

"Hi. Not build a quadrocopter. Buy quadrocopter."

"HobbyKing Predator 650 Folding Quad-Copter Carbon Fiber - very good model. I buy Holy Stone HS170 Predator Mini Quadcopter RC on site jonsguide.org. Holy 750 mAh batteries which recharge in 1 hour 20 minutes. Best model for me."