I love touring and the idea of a trip like the one the OP is suggesting sounds wonderful. For a single person with the time and funds to make such a trip work, it would be ideal. But the OP is not on his own. Being married changes the equation significantly.
I realize every couple is different, but if it was me, I wouldn't consider so long a trip, and especially not if it would make my wife jealous. I say this as a widower. My wife died nine years ago. I've had some amazing bike tours since then — tours I would not have felt good doing when she was alive. Today, I've been planning a short winter tour. But if I could have her with me once again, I'd gladly give up bike touring.