At face value it doesn't fit. So I'm thinking there could be a number of reasons for this -Her plan to open a cat sanctuary on the property doesn't fit with her not wanting to buy the lot.
1. She had a dream to open a cat sanctuary which didn't relate specifically to this plot of land.
2. She said it when she was in a different frame of mind and her worries about isolation became much larger as the deadline for the contract drew closer.
3. It was suggested to her to entice her, knowing she loved animals, and give her a project to make her feel better and picture a busy life there while B was away. They obviously had discussed the purchase during her therapy sessions and I have questions about them paying a therapist to discuss how rosy Caroline's life was.
4. Someone is possibly saying it now as a misdirection to hide a disagreement.
JMO