I've been certified in AZ for a little over 9 years, and it was a grind to get any traction with clients as Maricopa County has an abundance of appraisers. I was able to carve out my own little corner by becoming competent and well versed in outlying towns others did not want to go to because they don't want to take the time to become familiar with those areas. I will tell you that the SE Valley (Chandler, Gilbert, Mesa) is flooded with appraisers, and the AMC's typically pay less than the national average as they can always find some desperate part-timer to take a $275, 1004URAR assignment. It's irritating, but I set a bottom line and don't get out of bed for anything less. You have to value yourself and your work, otherwise there is not point in doing this job. Don't be that guy, becuase once those clientsknow you're cheap, they will always expect you to be cheap.
Complex assignments can vary. I've had 7000sf custom homes on 5 acres with a bass pond and 12 car garage, and detached 2000sf workshop in the middle of town. I've also had 10 acre properties with a manufactured home and high end horse facilities on the outskirts of town. It's all relative to what's available to compare it to in the area, but there are definitely complex assignments, even moreso if you get in close to Phoenix, Scottsdale, Tempe, etc. I don't go to those areas, because they just won't pay what I would charge to deal with complex properties and realtors in those areas.
As far as finding a house for $200-250k, good luck. They do exist, and it depends on what your looking for, but Chandler has become the Scottsdale of the SE Valley with Intel, Honeywell, GoDaddy, Infusionsoft, and other companies in close proximity. There are parts which will contain houses in that range, but you may be surprised as to how expensive it's become here in the SE Valley, particularly Chandler. You may have better luck in parts of Gilbert, Queen Creek, and East Mesa.
I reside and work exclusively in the SE Valley, and I'd also happy to share my knowledge and help any way I can. I'll send you a PM.