Keep in mind that if you pursue action, you could end up spending a lot of money and getting no satisfaction. Imagine how that would affect your heartbreak and/or anxiety.
Also, I would suppose, from prior experience, that a canon lawyer would be of no help for you, and could accomplish nothing. This is not a matter that canon law would apply to, inasmuch as any court that recognizes canon law would not be a court that is sympathetic to your cause.
I would suggest you send a message to Chris Ferrara and John Salza, to find out what they recommend. They are both lawyers, and traditional Catholics.
This question of real estate is going to become a lot more important in the following months, as SSPXers realize that their lifelong contributions are up for grabs, basically. It reminds me of churches all over the world that were meticulously build over centuries, with poor people contributing money they literally could not afford to give, to build the most beautiful sanctuaries money could buy. And then along came Vatican II and jack hammers tore out the rare and precious marble fixtures that had come at such a price.
I've never heard of a single lawsuit that recovered any of the lost contributions for those crimes. So why would it be any different now?