And yet, another reason for a dog to be rehomed by it's owner...incompatible travel schedules...amazing!
Well, all I can do is echo the same sentiments offered by other YT posters and to remind you that Pooter expected more of you than this as his person.
As pointed out to you previously on this thread, "if" Pooter was acquired through a reputable rescue group, it is usually your obligation to at least notify them of your intentions and/or return the dog ASAP!
Since traveling, hunting, boat races, etc require $$$ to do so, I'd suggest sucking it up and not worry about recouping what you've put into Pooter and instead do what's only right for him at this point and return him to rescue where he will at least have a chance at finding a safe & loving home who will want him this time "forever"...
If you need help in finding a reputable toy breed or breed specific reputable rescue group, please pm me and I will at least do my best to help Pooter for you.