Why in the world would people who don't have the slightest idea of what the rules are answer a rules question and then excuse themselves by saying they aren't a rules expert? The situations in the OP's question do not require a rules expert. He got a 7. Yes you can re-tee a second, third, fourth time if the situation warrants it. You can re-tee your ball, of you choose, any time you hit into a water hazard off the tee. You can hit a provisional if you think the ball is OB (or lost, but that didn't come up in the OP) but NOT if you think the ball is lost in a water hazard. These are basic rules, and while it is OK to not know these things is it just weird to try to answer a rules question when you DON'T know these things.