Do it! Get trained but then move to Manitoba, Canada - preferably Winnipeg!!!!
I thought about getting trained, too, at one point, but then I got caught up in doing other Early Learning "things" and my boy grew too fast! He's now almost four and I'm now on the homeschooling track. I WISHED that we had something like that here when he was younger. I'd recommend doing an informal poll with a few mommy groups at churches or libraries - or even if you have a family center in your town/city. This may help you determine if you'd have a decent group of clients to promote the business to.