Then we need an estimate about the force needed to move the thing. Lifting 2000 lbs is a no-brainer. But moving is another thing. If it is sliding (which it obviously is not) then we need a coefficient of friction. But, this one is placed on a carriage, so one could assume less friction. Let's say one tenth of the weight.
You then need 200 pound-force, which is equal to around 1000 newton (not new ton, Newton.
Speed: 10 miles per hour is around 16000 m/h or 4.5 m/second
Net power will then be 1000*4,5=4500 W or 4,5 kW
You will probably have something like 50% efficiency in a work gear. Could be better. So, at 50% and assumed roll friction 10%, you need a 4,5 kW motor. Or 6 HP.
Wheel diameters and gear ratio is your specialty. So I don't even try to get it right. But the motor size will be in the 5-6 HP range. Under the assumptions given.
Gunnar Englund
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Half full - Half empty? I don't mind. It's what in it that counts.