Hi Offshore,
After 3 months they will get a letter from the bank laying down the procedure they will take and it will be passed to another department where they will start to incur legal costs and interest to monies owed.
It can take up to 2 years to evict but obviously you want to nip this in the bud as quickly as possible,at you parents age this will not be good for their health and mental state.
The banks will listen if approached as the last thing they want is to take the property.
Remortgage seems the best option for you but as you rightly say, this is an expensive option in Spain.
You could try contacting Smiley on this forum as he will give you the facts about re-mortgaging costs and the feasable options you have.
Thw owrst case scenario is that the bank will take it and place it at auction,in this case your parents could lose their home and still be landed with the costs.
Talk to the bank,they do not want this to happen as much as you don't.
I hope it works out ok for you and your parents,it is a terrible thing to have to endure.
Reghards
Georgia