Everything is dependent upon demand and supply for homes in the location. Scottsdale is generally considered the better part of Phoenix Metro. So, Rental should not be a problem. Make sure you run a good estimate of elements of operating expenses (like repairs and maint, vacancy factor, property tax, insurance, and management fee, etc). That is the key for picking a good rental. Then see what will be your net operating income after paying for these expenditures from the rent it will generate. Then subtract your financing cost (P+I). The remainder will be yours to keep.
Added later: Some people say one should assume that half of the rent will go towards operating expenses. So, the other half of the rent should pay your mortgage (P+I) and to you. But, if you are buying old home or in a neighborhood where homes do not rent fast, you can assume 60% or higher of your rent towards operating expense. Best to talk to someone familiar with the characteristics of homes where you want to buy for rental.
Added more: Buy a home that is sized for the neighborhood. Buying a bigger than the average of the street will not get you more rent but increase expenses or leave possibility of an unauthorized occupant, if you worry about your tenant subletting a room in the rental.