Being a provider is a distraction.
It distracts her from being turned on. No one ever gets turned on by being given money. But if you start paying for everything she wants, then her pleasure and focus is shifted from delight in you to greed and what can she get from you.
So should you ever offer to pay before intimacy? The short answer is maybe.
The goal is still to get her turned on. Not to have her focus or worry about the bills. The idea is that you want her mind to enjoy the interaction with you, not enjoy the fact that you are paying for everything. So as long as the pleasure of the interaction is still her main purpose to spend time with you, than you are in the right direction.
Simply put, go to cheap places until she has proven herself.
Keep her mind busy (stimulated) while warming up her body
Contrary to popular beliefs that the mind and body is one, I believe the mind and body are separate and can have two separate desires. What you say does not need to be consistent with what you do. What you say does not even need to be a turn on as she could be repulse by it. What you do, does! What you say needs to please her mind. What you do, needs to please her body.
The body's natural needs cannot be denied by the mind, hunger, pleasure, urges.
The body's natural stimulant is to be touched. Due to social pressures, only the mind is disallowing such desires from the body.
If she is rejecting your advances, it is not because you need to change her mind, it is because you need to continue to turn her on more.
Don't bother trying to change her mind, get her to take action which will stimulate her.
You can offer a high five to start off. Get her to smile. Maybe a kiss on the hand. Get her to put her hand on your shoulders. Take a photo together. Learn to dance. Get her to spin. Move her to a different location even if it is only ten feet away, it is stimulant! Because you are now in a different place with different scenes.