Is your current house in trust for your kids or something? So you are allowed to sell and buy a house with the proceeds but not divest?
I’ve heard before of something similar. Colleague had a sister was married to someone she met at boarding school.
Family had a trust that was set up hundreds of years ago that would pay for school fees, university, college or apprenticeship fees, medical treatment and buy the person a house at age 21.
House could be sold and another house of same value bought but I think it stayed as property for the trust (so repairs etc carried out by the trust) so no cashing out in any way.
That couple both trained as massage therapists and ran a massage centre from part of the house in a very swish area in London. At first they do massages themselves, then they trained other massage therapists and eventually, by the time they had kids, they were just hiring out the treatment rooms to other therapists.
They didn’t need to worry about earning that much because house, house repairs, school fees etc all taken care of. But given the part of London it was in they were pulling in fairly serious money just from renting rooms.
Some ancestor was the much loved but illegitimate child of someone important and very wealthy who set up the trust system to ensure that their descendants would always be secure and happy but would need to do something with their lives.