Here are some more area realtor web sites:
There are other realtors in town without web sites, but I'm afraid I don't have any more information about them. Your 1K to 2K estimate per acre seems about right, but it's all dependant on location. The land east of town is typically cheaper and flatter - whereas hills (and especially views) cost more money. One of the nice things about the eastern property is you can get a proper view of the Spanish Peaks which are not very visible from in town (unless you live in just the right spot).
I doubt anyone would have a problem with you being a part-timer. I can't imagine why anyone would have a problem with a self-sufficient person moving to town.