A drive is the electronic device that harnesses and regulates the electrical energy delivered to the engine. The drive feeds electrical power into the motor in various amounts and at various frequencies, thereby indirectly controlling the motor’s acceleration and torque.
So the most economical choice would be a Three Phase Induction motor followed by a BLDC engine. I’d suggest BLDC ( for its huge market penetration in recent times,ease of availability and Electric Drive Motor easier consumer electronics/control ) or PMSM (Long lasting magnet 
synchronous motors )