If you got money, lots of money then both life is not a problem.
Single with money you can employ someone to take care of you and pay for good medical care to stay healthy for longer.
Married but to money if you are healthy you have to take care of your wife. If your wife is healthier then you have to see her suffering to take care of you, but it won't happen if you got money.

I think I can save more money being single.

"By all means, marry. If you get a good wife, you’ll become happy; if you get a bad one, you’ll become a philosopher"