I think this may depend also on the policy of your local council on "right to buy". If there is a long waiting list for houses the size of your friend's mum's, then the council's first duty is to house people who need that house, not to sell to someone who hasn't actually been the tenant. There was a thread on here a while back about a person who was living with his parent in council housing - the son had no automatic right to live there just because the mother was a long-standing tenant. I
I am sorry to say this but we all have to face up to the fact of other people taking over the houses either where we grew up or where our elderly parents lived - it's a fact of life.
I think her best bet would be to talk to the council as the very first step, to see if a) they would sell and b) how much the purchase price might me. Sadly it's very unlikely that any mortgage lender (IMO) would lend to a lady with only a year to live - and with your friend being on low income, the mortgage lenders need assurance that they are going to get their money back.



