If your dad owns the house and he needs to go into 24/7 care then his house has to be sold to pay for it. If you are 60 or older you can ask for a disregard, otherwise it is very difficult to get round it -that's the crux of it. Having taken advice before it is generally not a good idea to mix your finances as @Grannie G says if you are tempted I would suggest you seek legal advice first.