With nothing to do and notoriously flakey , she finally sets up a 'health retreat' on some land her parents give her ?
As a shareholder in the farm she is part owner of the farm surely? The land allocated to Spiritual Home was allocated because it was of limited use for anything else (hence I don't understand why it is so desirable to a buyer).
Whilst woo in yurts isn't my thing it is very popular. In the face of a lot of sneering from just about everyone except Jenny and Debbie she did build up a business which was doing quite well (based on comments of various cast members about how busy it was). As part of diversification its no more ridiculous than Adam's strawberries were (remember how scathing Brian was about the fruit?).
She also said for the first time in her life she had built something and her children respected her for it. However the rest of the family just continue to treat it as a hobby to be thrown away at will.
By taking legal advice she is only doing what they all should do.
On paper the logical thing to do is to sell the substantial property asset and downsize, keeping the land for the future. Brian's emotional desire to have a "manorial home" is no more logical than Kate's desire to keep her children's respect. Alice's hectoring of all and sundry as the "Daddy's girl" is massively hypocritical. She has her home and job, she has nothing to lose by screwing over Kate. Perhaps they should sell the holiday cottages instead.
What I hate most in all this storyline is Alice. Alice was an intelligent, hard working, lively girl. The LSWs recently have turned her into spoilt brat with a dubious relationship with alcohol.