Vesectomy!!!

Married, 24, with two kids, my husband is 26 and is wanting to get a vesectomy (due to my own personal problems I am unable to use any type of birth control) . As a married couple I feel like it should be an "us" decision. But I'm just not sure how I feel about it. I'm thinking that 24&26 is still awfully young to make such a permanent  decision?! Opinions? How young is too young to make this kind of choice!!??