I saw your post and I've been looking for almost that exact route. If you'd be interested, I'm looking to sail my way down into the Cancun area and do some land shopping. I can support myself and if it's out of your way I'd be happy to pitch in for the extra distance.
I'd also be happy to stay with you all the way down to panama. I love to sail and am really looking to spend some time on deck. I haven't been on a boat for years now, too busy working, and by now I've probably forgotten everything I learned as a kid.
I'm a 21 year old male by the way, still a kid to most I guess.