Equipment prices depend on a lot of things. Location,condition,location.
HP required depends on soil type,desired depth and weight/traction of towing tractor. Read below JD's specs on a Frontier brand 10 ft
MANUFACTURER
MODEL Frontier
DH1610
Dimensions
Working width, ft, in. (cm) 10.6 (3.2)
Weight
Operating, lb (kg) 4185-4851 (1898-2200)
Shipping, lb (kg) 4385-5051 (1989-2291)
Tractor requirements
Horsepower range, hp (kW) 60-80 (45-60)