Lydia is very impulsive person. When she sees something somewhere or wants something, she wants to have it immediately. For example, she went to Thyme and saw ferns, next thing you know her entire house is covered with ferns. She wanted old defender and in short amount of time there it was. Everyone else was getting small dogs, she needs one and needs it right now (buys puppy that was way to young because she didn’t want to wait). Same with clothes, jewelry, endless Hermes bags, belts and shoes, greenhouse and garden beds...
When she wants something, she doesn’t think about it rationally. She just thinks about how to buy it smallest amount of time. Same with her bungalow, same with her next house. She wants to move so badly that I don’t think it will be years until this happen, knowing Lydia this could be by end of this year because Lydia is that stupid.
Never happy, never satisfied, never grateful. And never aware of how privileged her life is with minimum amount of work and effort she puts in. She could buy a house in a heart of Cotswold and she would still be miserable because that’s just the way Lydia is (but at least she would be miserable with working toilets).