Well I personally think triathlons are crazy. Though of course most of my friends think the things I do are crazy, so it's a type of crazy that I respect.

Having a goal is a great way to stay motivated while you're recovering. I would set some sub-goals too, like shorter single-sport events, rather than jumping in with something big that ends up frustrating, stressful or de-motivational if your recovery goes through some slow phases or gets a bit derailed by temporary setbacks. But yeah, dare to dream.

What does your PT think of swimming for your recovery? I don't know anything about the type of injury you're getting over but sometimes swimming is a great way to get back into being active.