Drum Drive Gearmotor Selection

I’m designing a slow-turning drum and need an experienced engineer to specify both the AC motor and the reduction gearbox that will drive it. The drum must rotate steadily at 6 RPM and the load calls for less than 100 Nm of torque on the output shaft... (Budget: ₹600 - ₹1500 INR, Jobs: Electrical Engineering, Engineering, Engineering Mathematics, Mechanical Design, Mechanical Engineering, Motor Control)