I've been meaning to get back to this board to thank all of you for taking the time to respond to my original inquiry. My father has found a lot of support through various groups and we were thankful for the advice received here.
My father ultimately went with the Maple Leaf HIFU group in Toronto and I'm pleased to report that his PSA is negligible and he experienced only minor side effects. He says that the catheter was definitely the worst part of the experience, but I figure that's a small price to pay to eradicate cancer.
The staff up there was great and I'm glad we had the chance to access the technology in Canada. It's crazy that HIFU isn't available in the US yet. I just think about how many men are missing out on this option because they can't afford the price.
Again, thanks to all of you for your time and support and my best wishes to you all.