Depending on where you'll be working...you might consider areas outside of Phoenix. A safe three bedroom rental under $1000 with good schools might be difficult to find but is certainly not impossible! However, 3bedroom rentals under $1000 will likely be on the small side ex. less than 1300sq. The north west valley (Peoria, North Glendale) has great schools (Deer Valley School District) and rental rates are reasonable. Other communities to consider are Gilbert, Chandler, South Tempe, Ahwatukee. These Arizona suburbs are safe and offer newer homes and infrastructure as well as great shopping, dining, and outdoor activities.