You're questioning the wisdom of sideslipping a swept wing airplane at low speeds and low altitude...and wonder about the effects?
What is the effect of altering the airflow such that it's more perpendicular or normal to the leading edge on one wing, and less on the other? Think about it.
Yes, the structural integrity of the vertical stab should be closely considered. I flew large airplanes in an operation that involved regular slipping throughout the flight, and discovered cracking in attach brackets and bolts, and after careful consideration, quit slipping airplanes under those or nearly any other circumstance.