I don't know the content area for your technical college position, but I do know that if student demand is high, adjunct positions will be available now and in the future. In our college we have several adjunct and temporary faculty. Supposing one were in your position, I would tell that person to follow the touring dream because the temporary/adjunct positions will likely remain; for example, our college, in fact my home department, has hired temporary faculty every year since I arrived here in 1992. If the current dean believes you are worthy of hiring now, most likely that same sentiment will arise once you return and demonstrate your teaching abilities again. Of course the open position probably won't be there when you return, but who knows what the future holds. I can predict this, however: if you take the position it will probably be years before you embark on your tour, so I think the choice hinges on which you desire most, the tour or the job.