Yes, I remember you or someone else citing the Land Registry split threads back.
No, it doesn't look from that as if there was any expectation that the Walkers would farm the farm in its entirety -- but in that case, why on earth does SW make such a song and dance about Moth recalling presumably entirely imaginary inventories of livestock and farm machinery from an imaginary farming past and making a portentuous pronouncement about how they'll have to tell BC he needs to find someone else to 'use the grass' while they concentrate on biodiversity and the orchards?
If they've never been asked to farm the rest of the land, why even mention the grassland, or pretend you had a choice about it?
Like the 'I've been told not to make plans for after Christmas', it seems like an entirely needless lie, that includes lying about the size and scope of their hobby farm in Wales and their farming experience into the bargain.
(And yes, if all they had to do was manage the orchards and make cider, and they didn't even do that, you do wonder what they were doing, other than strimming a bit and taking some old rubbish to landfill. Even the strimming wouldn't have been done if they vanished for four full months in the summer time to walk from Cape Wrath!)
I mean, maybe BC was difficult to deal with, but it strikes me that one of the Walkers' most ingrained characteristics is screwing up some situation and rather than dealing with it, suddenly vanishing without any warning.