Bring in a third party
There are some guys who are very difficult to convince. These are men who have had a penny-pinching habit for such a long time that even though they can afford to spend on you and your whole village, they still have that mindset of lack and poverty.
It could be that he grew up in struggle and went through a lot to get where he is. And because of that, he still carries some baggage from those experiences.
The best option here, if possible, is to bring in a fresh perspective through a counselor or someone you both trust and he can listen to.
Get your own
It's very risky for a woman to fully rely on her man for everything. Even if he's generous, life happens and you never know how unexpected experiences can affect him financially.
So, if he's still firm on his stingy ways, maybe it's time to you to get your own. You will be more comfortable knowing that you're financially secure.
Find a man who fits your lifestyle
If you've reached that point where you realize nothing will change, you might have to do what's best for you.
A man who is capable but isn't willing to spend on you tells you that he doesn't value you as much as you think he does.
It seems you just have different points of view about money. And there's nothing you can do to change that if he doesn't see the urgency. In that case, a replacement wouldn't be such a bad idea after all.