In response to other questions. The rent was agreed at £400 a month. In the local area the starting price for property is £750 for a two bed, this is a three bed semi. Yes, we could have bought the house and it could have been shared between my husband his siblings, and yes we will ultimately benefit if the property is sold, but we did not buy it to sell it. Furthermore, we bought it by making huge sacrifices, we are not rolling in it. We all (the whole family) had lengthy conversations before we did anything and everyone agreed. We felt it was a win win, my MIL would no longer be paying rent, we met all repair costs, MIL desperately wanted to carry on living there an not be at risk of having to move and for her youngest son to continue living in the home he had always lived in. He knew he would not be able to afford to live in a comparable house without this arrangement. Yes, we bought what had been council housing stock, as have many others.