I always bought Service Mfg equipment. I’m old and believe they went out of buisness, but they made some top equipment and implements. I had a 6ft flail built by them. At your HP, I’d stay at 5ft.
You look at used, just make sure both bearings on each side are good and check gearbox. Take a 3/8 drive ratchet and a adjustable wrench to check fluid.