The yaw kick maneuver is required to be designed for, but it is not actually performed. I use it to show the kind of structural loads that the helo must withstand, and why a little taxiing is no big thing!
Regarding old age, there really is no thing if you properly maintain your machine. The factors of stress do not build up damage if the loads are kept low enoughh - a level called the "endurance load" which is the level below which one can apply infinite cycles of load and have no residual damage.
The biggest threat to the airframe is corrosion, as most restorers of ancient airframes will tell you.