Welcome to the site Sooner1982!

A 60lb compound will work fine. You may end up getting in a bit of a workout between the draw weight and pulling your arrows out of the mud... but I know people who regularly shoot that weight and higher for their bowfishing rigs.

I don't know much about the spincast reels for bowfishing. I'll let one of those guys answer you on that one.

A retriever will work great if you can't get the spincast working for you.