I'm thinking of tipping a bartender $1 each for over $50 worth of drinks
She may be dealing with a lot of orders, and a lot of drinks may be bad for your health. Make sure you are tipping appropriately.
She is hot, I'll order more drinks after the first round.
The bartender might be attending to other people, and may get stressed with you ordering too many drinks. Plus, you drinking a lot of drinks may be bad for your health and you may regret the things you would say to her because of you being drunk.
I'm going to tip early than later. Good idea?
Yes, stay on top of tipping so she feels fairly treated. It's good to try not to drink to much.