I do so empathise, Frank, with the lack of intellectual stimulation. My marriage, which has by no means been made in heaven, had a strong base of repartee and gossip. My husband used to bring home nuggets of information about people which we both enjoyed. Then I was made redundant, and crawled home feeling bereft of all the day to day challenges of work, while he was slipping into dementia and gave me no support whatsoever because he just couldn't.
Awful, awful, awful, but the most dreadful bit was no brain stimulation at all - even struggling with being shafted at work provided something to chew on, however nasty it was.
Four years on it is still not so clever, but I made a resolution to make more local friends in my own right (when I was made redundant I sold up my London flat where I lived while working, and relocated here where older, retired, husband had been on his own during the week).
It is still horrible not being able to talk to him in anything other than platitudes, and I have to force myself not to argue with him when he is talking absolute rubbish (at the moment it is about some threatening person who is going to buy our house, and all the houses round here, for redevelopment - complete fantasy). But I do go out on my own, for girl's lunches, or on committees, which is a poor substitute for a partner, but better than nothing.
Your nomadic existence would not make that easy, but you really do need to have your own circle of friends, whether it is people in the same boat to moan at, or people who have no idea about your home situation who can accept you for what you are. TP probably can provide those in the first category, and if you would like to try the quiz I have this very day struggled to produce for the local book club, send me a private message and I will use you as a guinea pig!