There's too many unknowns for this to be accurate, but 'level 2' being $10-20k seems about right. It wouldn't have a lot of expensive materials though, and might not even be bipedal, but should be roughly human-like in shape to operate in our environment. Prices would have to be low enough to at least lease one like you might a car. The problem is, we probably won't see things like this for another 10 years or so, and the economic situation might change by then. Also the availability of parts and materials will change. Some prices may go down, some up, and new tech will be available. But I don't think availability will be directly linked to wealth. I think that in the future, robots will be desperately needed for a variety of reasons, and will become more of a necessity than a luxury.