I've known many people who have had their parents provide loan security for flight training. None have truly realised what a big risk it is. The general story seems to be that Jr. has told mum and dad that although 70k is quite a bit of money it's nothing in the medium run. After all, at the end of the training Jr. will soon be flying an A320 at 35k per year with a left seat upgrade bumping up the cash to 80k a few years down the line. Reality is more likely to be a period on the dole followed by an instructors rating and sub 10k pa FI work until you get the big break; and that will probably be with an unstable freight outfit trying to rob you of another 12k for a type rating to fly HS748's around in the night.
Do your parents truly realise what they are getting into FlayinSpanner? Do you realise it? I don't think that there is going to be any way of avoiding the odd heart attack. It might be a decent time to let them know this little fact.