If it was easy, every one would have the top planes. There would be no drive to earn them either.
I only have 1 top plane and I have been playing almost one year. BTW you dont really need the best plane to be a good pilot. The only nice thing about them is that you can carry more ammo. You can also carry 1 more bomb, but most of us wish we could go back to just having 1 most of the time
Just avoid dogfight missions!
Pay up or ..........dont pay up and just earn it