Here's a hint: When the bike is parked, leave the clutch lever in the locked (disengaged) position. This will hasten the clutch cable stretch problem.
And yes, it is normal for the cable to stretch at first and require some adjustment. Leaving the clutch disengaged, lever locked, will reduce the number of times you need to adjust tension.
As for tension; you want little to no slack in the cable. Don't make it bow string tight but just so there is as little slack as you can get without putting pressure on the bucking bar and clutch actuator system. Be sure to lubricate the cam, bucking bar and ball bearing with a good grade of bearing grease.
Good luck. Let us know how it works following these suggestions.
And where the heck is, Pawleys Island?
Tom