I agree that most men don't know how to plan a party, but most men do know how to open up some bags of chips, buy a huge sub to split up and some chicken wings.
I think it is rude to ask your guests to bring the food. It is different if you are having a get together or a holiday celebration, but anytime a gift is involved, the guest shouldn't have to bring anything more. Just my 2 cents.
The OP obviously knows the husband and if she says he is cheap, then he probably is and it's not a case of being ignorant as to how to throw a party. Doesn't she have sisters or close girlfriends he can ask for guidance?