Places in HK where you can buy them with BTC. Only recently I looked into RC flying again, a lot happened in the last few years. LiPo powered e-motors seem standard now, most models are ready to fly. Don't know if I like it, in the good old glow-engine times building the thing was at least half the fun. Ideally from scratch, not a kit. However ordered a c182 and it is a different approach to flying - you don't really care, the thing can be easily fixed and sustains little damage even on the hardest landings...