Hard work.
Or marry someone rich, and maybe get rid of them if necessary.
That is easy to say but in reality sometimes you cannot just marry a rich person just to make you rich, you must have a look of a superstar to let someone marry you. Rich do protect their money so they will not just marry anyone who will just take their money in the end.
Haha I think that is a good idea that you are going to marry someone rich. And you are lucky enough if you are able to be married with a rich wife/husband.
I don't know if his/her family is going to accept you that way easily. So, good luck!
If the families knows your intention they will make it hard for you to marry their child and that is also dangerous even if the one you want to marry is deeply in love with you because the family will make a way to even kill you to protect their riches.
I am not saying it is an easy path, but come on...if you are willing to undertake this path you must have some skills to overcome obstacles like: Being Ugly, Old Money, Family members.
If you are ugly, either take sex education classes at your local Y and become the best lover you can or be prepared to get very kinky.
Fooling the Authorities about how this all goes down will surely be harder than fooling family members.
Maybe part of the plan needs to be a family gathering at the
Lake House that goes horribly wrong and leaves you the only heir.