The helicopters you referenced are more toy-grade not hobby-grade. Built just good enough to work but when something breaks you are down for weeks waiting for a part from china and forget about any support from the companies. A hobby-grade machine is a little different. Yes a little more expensive but better engineered/built and parts are readily available at you LHS. You get what you pay for
Also you might get further along if you refrain from insulting others here just because they don't have a toy-grade heli. Oh and yes I did have a WLToys machine once just to see what it was like and I was not impressed. Just a cheap copy of another better built design.
Good luck.