Weighting an I/O

I'm sure this has been asked a million times, but I'm exhausted of searching through threads all over the internet.

My wife and I are looking to get our first boat. We're going to get a newer used I/O for a few reasons:

1. We don't want payments, this will be a cash purchase.
2. My family likes to fish (when not wakeboarding). I have fished from an inboard, it wasn't much fun
3. This is our first boat. I have to teach her, as well as others, how to drive it. (it's going to get a few dings).

What's the best way to weight one? Does anyone have pictures of an I/O being weighted or the wake their I/O produces? From what I've read so far, the best way to weight them is a 400+lbs sac near the bow of the boat and use the trim to clean up the wake. Does driving for an extended period of time with the trim slightly up damage anything?

I'm not looking to hear about how I should get an older inboard... I've already heard all about that.

Thanks everyone!