I think her doubts were because she wanted him to sell the farm, because it was an obsession with him (this ‘dream of returning to the land’), and he seems to have had unsatisfactory previous tenants. RW quotes his wife, when she meets her, saying she’d been furious when he first said he’d offered it to the Walkers because the farm had been ‘a huge financial and emotional black hole’ for him. The whole family had been planning to move there from London before his wife got breast cancer, and by the time she’d recovered, his ‘focus had moved on’ and the children were too settled in their London schools, plus his wife just didn’t want to go and live out his dream. She just wants him to sell it and stop having sleepless nights about it.
Interestingly, Raynor gives ‘Rachel’, the wife, a cancer survivor, a bit of side eye as she describes her in TWS, as this powerful figure who might pull the plug on them, and who gives her ‘a hug that held a casual, assured resilience’:
I watched Rachel as she looked across the land, a woman who had the power to end a dream or fan the flame
She’s really good at biting the hand that feeds them, or if not exactly biting, snarling slightly at it .😀