You know, you're in a PERFECT area to capitalize on the granola crunching yuppies.
And I totally see how living on the farm would be cheaper for you. For me, it worked the opposite. I double my rent by moving back to town, but a I went from spending $30 a day in gas plus losing 2.5 hours on a daily commute to walking to work two blocks away. THAT adds up! I also put myself right smack dab in the middle of my target market clientele, which also is good. I never would have been able to connect with this market from the cabin.
Make it a point to do what you can to tap into that urban market while you're there, now. Develop a reputation, brand yourself and your farm, and collect a contact list so that once you move you can still get in touch with people that will be eager to buy whatever it is you're selling from the new local agrarian upstart.
I feel like after spending a couple of years in town here, we will be in a much better position to make a go of a rural lifestyle where we won't have to commute. It is a comforting thought.
(Now, I'm going to go look into that medical transcriptionist thing.)