ETA: this started off as about the state of the house on the farm owned by city trader, but helps slightly with dates because there's a reference to TSP going into paperback (seemingly spring of 2019). They seem to have been paying rent on the farm since the previous October, when they start working on the house, but didn't move in till 2019.
@AldoGordo, from what RW says in TWS, the farm owner (named as 'Sam', with soft hands and wearing designer sunglasses) on their first meeting says no one has understood his vision for the place (implying he's had other, previous tenants that have not worked out? there's also a reference to the previous tenant's livestock) and would they like to come and live there and 'put nature back into this battered landscape' and 'wildlife back into its hedgerows' -- would they manage his vision for the place, which is a 'biodiverse farm that still keeps a few sheep and makes cider, but puts nature first.'
RW represents her first response as being mistrust. 'We would need to put the past behind us, walk away from the memory of where trust had led us before.' The reason 'Sam' doesn't move there himself is because first his wife had cancer and then his children were doing school exams and too happy and settled in London.
The house has apparently only been uninhabited for a period of months, because 'Sam' had planned to sell the farm, but it's apparently in terrible, uninhabitable condition, with pools of standing water on the floors, serious mould, mice, and a dangerous heating stove. And then someone vandalises it before they can move in.
It's not clear to me why they are paying 'Sam' rent for an uninhabitable house (there's no reference to cider being made at this point). At this point they seem to be living on TSP's advance.
They start working on the house in October but say they won't be moving in till after Christmas, and then in February RW says TSP is about to go into paperback (which was in 2019), meaning she has lots of demands on her time, and Moth is talking about 'being in no position to buy livestock' and how they need to tell 'Sam' that they can't farm the land themselves, only come up with a rewilding plan, the orchards and cider-making. He wants to go with R to her book events and also to do another walk (which is the Iceland walk).