I got the motor off an old golf trolley to try this out & it worked a treat,.. seemed the perfect speed to me.
My gripe was that I wanted it to be remote control,.. and if it was winding untended it needed a fancy hose layering system,.. I attempted to build one from scratch (The crappy hozelock reels which have this feature just aren't tough enough for a working environment) but just didn't have the tools to do the job properly. I'm waiting till I get my 3d printer to try again,...