I am trying to find out as much info as possible so I can ask them for support without risking heart attacks.
There's a big difference between nay-saying and sound advice.
If you are using your parent's home for security for your pilot training, then all semantics aside:
They are borrowing the money, not you.
They are taking all the financial risk, not you.
They are the ones who will potentially face the courts, not you.
They are the ones who will potentially lose their home, not you.
Ask yourself these questions.....
What if you don't pass your training? (This has been known to happen for a wide variety of reasons.)
What if something crops up where you cannot pass the medical anymore?
There are dozens of other scenarios which could leave you (well, your parents) high and dry.
If you put your mind to it, you could raise the funds yourself well before your hair falls out!
It's called working three jobs. Getting five hours sleep a night.
You risk your parent's home as if you didn't have a care in the world. Putting their time and effort on the line.
Like it or not sonny, they don't owe you this.
This is YOUR dream, not theirs.
Be responsible, and independent and do it yourself!