Dan, Jedd is right, wholesaling in an area that you are not from, or currently living in can be tough. Here is the rub:
1. Wholesaling is probably the toughest job in real estate (Sorry, but I'm not going to sugar coat it). Many experienced wholesalers END up there after years of RE experience, most don't start there.
2. Almost all successful wholesalers are good at solving people problems. This is a PEOPLE business. If you are not on the ground in a market to meet with people and build rapport you might have a hard time. I have a very experienced sales lady who works with me and who is EXTREMELY good at building rapport, and she has a hard time doing deals over the phone is other states we wholesale in.
3. Real estate is local. Getting to know pockets of neighborhoods and nuances of certain markets takes time, even if you already have a good base knowledge about how to do deals. I'm an experienced wholesaler (done it for years) and I recently started wholesaling in other states and I can tell you that there is still a learning curve.
Now, all of that said, don't let me discourage you, it is possible, but it definitely isn't easy money IMO.
Just my .02