Hi, where have you looked at so far? That was pretty much our requirement for a venue - we got married at Hyde Bank Farm in Stockport. Beautiful venue, and great family run business and catering. They had a big expansion and renovation just before we got married so prices may well have gone up, but it was very affordable.
Also maybe try - Aclumlow Barn, Oak tree of Peover, and we also looked at The Yellow Broom in Twelmlow which was something a bit different.