Interesting thread and some great ideas by a few members. I have no experience in guiding, but I have an opinion (you know the cliche`).
Anyway, I like the idea of supplying those who want an unguided or semi-guided hunt, but don't have the equipment and/or knowledge of the area, regulations, etc. I bet there are plenty of folks willing to dole out some bucks for experience and knowledge. A well designed web site with plenty of google search words will help tremendously. Your site needs to appear in the first few results and look professional with a lot of success pictures and stories. Could be minimal capital investment with this option. And, a stepping stone until funds come around.
My other thought is to find a current guide service who is planning to retire in five to ten years. Buy in a little, work off a little, and buy the remainder later. mthusker's recommendation could lead you towards possible entities.