Ask yourself how he would cope with that, too. Will he feel he can’t love you if you are the caretaker and breadwinner, and he can’t give you anything? More to the point, ask him that: How would he cope, if he got in some terrible accident that left him incapacitated, and to add insult to injury he was sued for the incident, lost all of his money, and had to watch you go to work to support him in the manner in which you are capable? How will he feel if you don’t have the career work ethic that he had for himself? How will he feel if you do? These are scenarios that any couple can profit from having.
Also, investigate why he is not interested in women his own age and what it is about him that seems better than the men you know your own age. How did you become attracted to each other instead of those your own age? How will this change when, for instance, you become more like the women who are now his age or you become less impressed with the experience that comes with being his age?
If you find substantial things in each other–I mean things that time or circumstance alone cannot rob you of-- that you would have been just as happy to have found in someone your own age or that you think are rare even in people the same age as the person you want to marry, that is far better than if you are attracted to some aspect about him (or he is attracted to some aspect about you) that you may not be able to hang onto.
For instance, my husband is 8 years older than me. I’d have been interested in him if we had been the same age, though, and vice versa. He is simply unlike any other man I know, and as nearly as I can tell, the qualities I fell for were very much in place ten years before I met him, and are still in place now, over 20 years later.