When will that special question happen?

I have been with my SO for 6 years we have talked about getting married but I feel like it's taking forever. He keeps telling me that I deserve a big ring and that he wants to save money for it and that's why he hasn't done it we live together and he is not saving a dime. I've told him that honestly he can go to walmart and get a really nice cheap one I am not the one to want something expensive. We have 3 kids so maybe we're just busy with life you know but I want to be a wife not a gf for life. If you're married or engaged how long did you have to wait until you got proposed too? How long is toooooo long to be like " yea girl he's just dragging it cause he really doesn't want to". If it took many years did you feel like he was doing it because he felt pressured or because he really wanted to get married? Please don't ignore my post thank you.