I walked away from my dream to provide for my growing family; I had my last sanctioned fight at 26 years of age and my girlfriend (now wife) who was 6 months pregnant at the time was my cut person/corner nurse. I lost. Then I took a long, objective look at what I was doing and where it would lead. I still have regrets once in a great while, but my pragmatic self knows I made the right decision.
You don't have to pigeonhole yourself into an agriculture related field, a degree opens all kinds of doors. There's a company called Flyin' Miata that semi-recently had a job opening for a sales/marketing/etc. position and one of the requirements was a degree. It didn't matter what kind, just A degree.
I've encountered this quite a few times. Maybe you could use that degree to land a great paying job with a predictable schedule then you could buy a boat and go fishing as often as possible.