Hi there,
I find it really hard to comment, because you situation is quite complicated.
But I want to support you that it was a lot harder in the 80s, and that the older generation (aka we ;-)) had it lot harder. I have friends who are my age, who are otherwise very leftist and open-minded, and they still have a problem with trans. The 80s were a tough decade for trans people.
So it's very believable that you wife is just stuck in that mindset, and nothing you do can change that. It's a different worldview really. Younger people have grown up with more information. In the 80s, gender was "chromosomes" and as we all know, they can't be changed.
I myself had a hard time to get rid of that worldview, which delayed my whole self acceptance process for many years.
It sounds like focusing on your business to become independent would be a good idea right now. It can only strengthen your position.