I did a little looking around and the lowest kv I ran across was a 750. I suspect the power would be fairly low at the low throttle setting required with a typical RC ESC. Depending on how much power you need it might require additional gear reduction.

Most ESCs like at least 6 volts or so to work, but there are ESCs intended for single lipo cell 1/12 scale racing that work on around 4 volts.

Controlling it without a radio is easy, use a servo tester. Also known as a servo driver or servo controller.