My buddy skis behind his 2014 Malibu LSV ( 23') and he does just fine. He says its good for a 23' wakeboard boat and he seems to do just fine behind it.
We do Lake Powell with them every year and your schedule is exactly what we do.
Ski in the morning, Pull tubers and wakeboard until the kids arms are tired and then we surf into the evening. we fit 13 in his boat, but make sure you get the bigger motor if you do or it will be really slow to plane.
Look in the classifieds here on Wakeworld.
Dave is selling the Wakeworld Boat for $75K and it is one of the nicest boats you will find and has low hours. I have been drooling over his boat for a while now and has everything you want.
http://www.wakeworld.com/classifield....php?view=5167