Try your local vintage tractor club, there will often be an enthusiast with all the kit but no where to use it, will be delighted to come and work on a plot that size.
If there isnt a local club, look out for locally for an enthusiast or another small holder who might be happy to come and do the job for you (or will know someone who will). Tell tale signs are tractors in domestic garages..implements in gardens etc. Don't be afraid to just knock on their door and ask if they know any one who would be interested in..........the worst they can say is no.
Expect to pay by the hour rather than by the acre on this scale.