Im surprised at the level of coldness in some of the replies.
Whats in it for you..etc. tell em to sell up.. the cheek of em putting this pressure on you..
The parent is almost 70, worked hard, provided for you all, got done over like a lot of folk, and as above said, probably quite embarrassed to find themselves in this situation at this stage of their lives, have always been looked up to by their kids and now, to be reluctantly asking for help. Flippen ek, how cold of a society have we become.
Their €600k asset will be your asset in due time. This should be about you all as a Family, and not how it will impact you as a Twenty-something or other.
Yes, you need a professional to mediate, and it will be money well spent, but they need to stay put in their home. Back them up without the feelings of, what about me.