I am planning a Las Vegas trip for 2 people in 2 states in September do you have any money saving travel tips?

This will be my first time going to vegas I live in Florida and my Mom lives in Michigan. I want to surprise her in September with this trip. We will be leaving from each of our separate airports and I would like for us to arrive around the same time. I would appreciate any travel tips anyone has about deals , hotel , car rentals, must do things while there, best hotels. Thank you !