Yes, buying more cheap motors is a good idea, as you can see from my post. The website looks expensive, and very risky. Please try Hobbyking. The only risk is the shipping times, which may be ridiculous. They will not rip you off. If you buy all the parts from Hobbyking, starting with their cheap frame, it will cost <$100. There is plenty of work to do putting it all together, it is like you are building it yourself. After that you can make improvements and enhancements like GPS and other sensors. Cameras and autonomous navigation. You will spend much time fixing the broken frame. You might as well start with something that works the first time without debugging and testing unknown components. I have glued my frame now 10x from crashing. It is not a strong frame, but it is easy to repair. I think I prefer this wooden frame over aluminum which would not be so easy to bend back without breaking. The frame at Hobbyking is only $30 with 4 motors. I'm going bigger next!