I know I'm not addressing the OP's question - but I can't help butting in to say that this thread has me thinking I must live in a parallel universe to you all.
My income is £19k per annum, and I recently had to leave my Croft as I had zero savings to make necessary repairs. It was so bad that I was classed as Band A (emergency) for housing by my local Council.
I consider myself incredibly lucky that I now live in a beautiful seaside village in a Council house which is bigger and brighter than the hovel I left, with great access to local towns and public transport. It could have been a junkie infested tower block in the middle of a city if I'd lived in a more populated area of Britain.
Reading all the posts in this thread I think there are a lot of people who just have no idea of how fortunate they are to have a decent house themselves, and as for OP's wife, I cannot for the life of me imagine what she thinks she's done to deserve to just state "I want" and have the world fall over itself to oblige her.
OP, stop being a wimp: tell your wife you can't afford what she wants and let her throw a tantrum if she feels the need to. She has - presumably - a house already.
That makes her hugely privileged compared to these: " Overall, Crisis estimated that around 227,000 people were experiencing the worst forms of homelessness – rough sleeping, sleeping in vans and sheds, and stuck in B&Bs – across England, Scotland and Wales in 2021." And that was 2 years ago, it's undoubtedly worse now.