My view is that this is probably not going to get any trainer options for it. Almost everything in this game can be made to allow you to fly however you want, but stressing the aircraft, stalling it, or running into things is likely going to cause the failures you speak. The point of the simulation of this type is that it's a challenge and real. And there is a LOT of complex stuff going on. Maybe if there was non-server credits to buy things or customize, etc. Or something similar, but there isn't.
0x90 has this game, I have no idea what he can or will come up with..
I haven't played the game. Is there a timer that runs out? Or what makes you failing a mission?
I've also seen an option request for no plane damage. From what I've read the game only has an instant kill if you fly too low. Is it that or is there a health bar and something that makes you receive damage over time?
I don't see a high chance for a trainer, when everything can be turned on/off in game settings and everything that is requested can hardly be searched for because it works like a switch and when its on you have to restart the flight.