Should a sister accept her terminally ill brother's house to create a trust for his son?

A terminally ill brother plans to transfer his house to his sister to create a trust for his son, aiming to secure his son's housing. The sister would sell the house and purchase a flat via a trust, preventing the son from selling it or misusing funds. This plan has significant tax and legal pitfalls for both parties. Experts advise setting up a trust through a will as a more straightforward and secure method, potentially using a vulnerable person's trust for tax benefits.