You Don’t
Marrying for love doesn’t always guarantee happiness. There is still a chance that everything could completely fall apart no matter what your reasons were for getting married. However, when you marry someone knowing that all you really want from them is their money then you should be prepared to earn every dime of that money.
It is really easy not to see the red flags when all you are doing is looking for dollar signs. This kind of thinking will only lead to misery. Who knows what else you might miss when you don’t pay attention or refuse to acknowledge the unpleasant things about them. The money won’t help you put your pride back together after it is destroyed.