My man is hopeless with money

I am marrying a wonderful man but I have discovered that he is hopeless with money.

I put money aside each week as I know we will run out before the week is up, which is just as well as we usually do.

Eventually we want to have children but I feel that I will always be searching for money to pay the bills.

He is lovely but this is his one downfall. How can I tell him that we need to be more sensible?