Unless you plan on hiring someone to work for you (not some outsourcing deal, but an actual employee, or a sales person on commission who you can get
excited) I think you should focus on selling it yourself, since you know it best, can gauge the quickest whether it's actually sellable,
and you're passionate about it - the most important thing!
You can always outsource the sales later once you've figured out the best techniques, the most common objections, etc, and can instruct an outsourced team on those issues.
So where do you find the time to do this for real if you have a day job? Take a week of vacation time as soon as possible and work your ass off during it. If the margins are huge and interest is high and you can sell it well, then keep doing that and quit the day job.