You should be able to machine those parts though a 4th axis might come in handy. You will have to pay attention to radiuses especially in the pockets. Some of the corners you show can't be milled for instance the inside corner we see at the top right of the hub. CAM and fixturing will certainly be a challenge but I am sure you are up to it!
There are a lot of RC heli enthusiasts here. Have you seen this fairly recent thread? http://www.cnczone.com/forums/tormac...r_tormach.html