Many people feel threatened when they cannot accomplish the same thing someone they view as their peer can. If it matters to you, you could point something out to them that makes your situation different, such as you did not have children to support or you saved a lot of money by bringing your own beer to pubs (as you mentioned in an earlier post).
The big red flag to me is why your wife is not on board with your plan. I would definitely try to figure out why not.
My wife is from Japan and believes that we should all do 18 hour days!