First boat help wake/ski

I need some help from you guys. I am looking to buy a used boat that I can take the family out and have some fun with, wake/ski. I have three kids 16,19 23. Total combined weight for all 5 of us is 750lbs. I am getting so overwhelmed by all this research.
There are just to many direction to go, inboard, outboard, etc, size, hours. Let alone which make. I have about $9000 saved. Thanks or your time.