There are many guys who are very capable of getting married and taking care of their wife at 30. Many guys can actually do well around 25, marriage should be a growing process for the both of them, so you shouldn't worry about the age.
To my understanding she has decent career, and a guy and with same standard if both willing to work they could have more then decent lifestyle.
The issue come when she want him to solely responsible for her lifestyle, (she is not very lavish but still a good one), it seems to be a bit unfair to me.