Ok lets through a few ideas around then.
Although crude, Slumpy's system is effective and does do the job

Because you have the ability of disengaging the drive motor (battery drill) to allow free-spooling unwind of the hosereel or even by slackening off the clutch you can leave the drive motor engaged and unwind.
The battery drill idea also makes use of an adjustable slipping clutch so if the hose gets snagged on rewind the motor does not take the hit and overheat.
Ideally a 12 volt powered dc motor would be preferred, can't really see a need for a speed selection option. Hand held pistol grip on/off control would be good. A hardened keyed shaft for longevity mated to a belt driven pulley system.
Still thinking of a slipping clutch mechanism though.