You could strike lucky in the county archives once they reopen. Solicitors' records, tithes, enclosures, permission for this and that (I found permission to buy cement during postwar rationing), business records, estate records. Also other local newspapers not yet online, parish magazines, local histories. Need time, patience, help from archivist, and luck!
If I remember there was a ww2 survey of farms, now at Kew. Not sure when the annual farm census began, but it's records could be interesting (census of livestock and crops, not of people).
Could always be worth writing to the current owners: I got back 250 years by ringing one doorbell!).
Another thought: look for records of the manor via the Manorial Documents Register.