Due to advent in technology and as understanding of people widen and deepen, this type of relations is gradually gaining acceptance in the community.
Being with someone 7 years or younger or older than you can be considered both as a curse and a blessing.
Financial stability is one of the reasons why a woman wants an older man alongside her, but there are situations when women do go for a younger man just because they are financially established and care more about happiness rather than anything else.
Age disparity does show a lot especially for the older women that settle with younger men.
Granted, it will not be easy to find someone that has the perfect age gap you want, but keeping this in mind will help you have a better, more constructive relationship which will pay off in the end.