I know from previous threads here that there's a few RC helicopter crazy members. I don't know anything about them. Thinking of getting my father one for combo father's day and upcoming birthday. He has, when he was younger, actually flown real light aircraft. I know he'll love this as a "toy".
The previous threads confused me a bit. Talking about "45s" etc. Can someone please put this in lay terms? I hear there's coaxial rotor ones that are easier to fly, but only do 2 axes or directions. Single rotors are harder to fly but more rewarding, and more expensive.
Any of them crash-friendly?

I know my brother got a "learners" RC plane and it was made so the common parts to impact were cheaply replaceable etc.
What about battery/electric versus petrol motors? Pros/cons? Costs?
Budget I guess under $200 all up? Where to buy etc? Brisbane or Gold Coast.