I think Ward was an engineer or an architect. If he was 48 when the show started that would make him about 35 when he had kids, that would be a smart move for sure. I do know the secret to their happy marriage though. Every chance he got, Ward was hard on the Beaver...I caught an episode or two while I was sick earlier this year, and in one of them Ward said something that got me curious about the character's age, so I looked it up. As I recall, the character's age is the same (roughly) as Hugh Beaumont's, and he would've been 48 when the main run of the series began. Ward worked in an office, but I don't think they ever specified what he did.
FWIW, the leg crossing probably had more to do with standards and practices than anything intrinsic to the character. Broadcast TV was a lot more tightly controlled back then.