how much is too much?
I remember something a buddy told me years ago when getting into giant scale, If you can't afford to go out break it and buy a new one don't do it!! If you can-go for it!! I guess that's the only way to really test your airframe if someone else hasn't done it yet with theirs.
That might not help much but it sure has made me think about what I have tried to accomplish with each of the aircraft I have owned,and what I have asked a particular airframe to do time after time.