When to tell your girlfriend your a millionaire?

I have been seeing this woman lately, she is 31 years old, I am 20 years old. She has two kids, she is from puerto rico. I honestly havent met another hispanic woman who is this hott and super nice. I like her a lot. She doesnt know yet that I have loads of cash stashes away, I drive a range rover and live in nice house on the lake but for the most part I hide and am cautious with my money. We are just starting to date and I am concerned if I tell her that she will only want to continue seeing me because I have money, on the opposite side, If I wait to long I don't want her to be mad that i kept it a secret for so long. Any ideas? Money has ruined a lot of relationships and marriages so I am puzzled on what to do, any advice?