I'm so sorry to hear that. It's worth asking around, because some of the people in this forum seem to have insurance that places a cap on their co-pays, so that it stops after (say) a few thousand dollars. I don't know enough about U.S. insurance to offer any concrete information, but fingers crossed that there are options available for you.

I could just afford US 920 (CAD 1,300) / month, but it would put a cramp in my family's standard of living. If I had to add an even bigger co-pay for Erleada, I don't know how we'd manage for long without burning through our retirement savings. I hope you find some better options.