I am in a similiar situation. There are several conditions that will dictates the sales of the MH. It says that the husband will execute his rights if a) you remarry, b) your partner moves in, c) you suddenly drop dead (sorry , not personal)d)when your last child reaches the age of 18 or finished university education, e)the wife's right to buy the husband's share of the equity by agreement. There is also a clause (in my case)that the husband has a first charge and can execute his demand if I was in arrears of payment. Guess what...I went to the bank and borrow against the house (equity) to buy him out asap. I am waiting for my solicitor's return from her holidays to set the ball rolling. I will let you know the outcome.
However,I am no expert, only sharing my own experience with you.