When is the gap considered too far?

Hi I’m 19 going on 20 in like a week or so and I met this guy on bumble (39) and he does really well for himself and he already knows that he wants a serious relationship with me. We were talking long-term goals and he was saying he would be happy to pay for my schooling if we were to get into something serious. He’s very serious about wanting a wife in the future and what not. Im torn because I like him but my mom is concerned about his age (she’s 40) I just need some advice. Side note, him and I already went out on a date and got drinks and we’re already planning on seeing each other again and I think I do want a serious relationship with him. Am I too young? Are his intentions in the right place?

Update: I had another conversation with my mom and she said that she just “wouldn’t want to have to identify my body” which I feel like is taking it a little too far honestly lol. And her reasoning was because I’ve had a stalker before and she doesn’t want to go through that again, I don’t either obviously. I would have just hoped she would trust that I would have better judgement after having been through a situation like that.