My dad is 85 years old. He is still sharp in his thinking, except for this. He has an invention and thinks he will get a patent on it, then have an investor take it over and there will be a large factory right here in Florida to make this invention and the factory will employ several people. He is constantly asking me and family members to help with his idea. He is even harassing the neighbors. Our family is doing everything we can to care for them (both mom and dad) such as cleaning, grocery shopping, doctor’s appointments and everything else. Our family has no time to put time into something that is not going to happen, and he is getting really angry telling us that he is doing this for us. Do I continue to let him continue with this and risk spending any money he has left or figure out a way to put an end to it. I don’t want to shatter his dream but at the same time, I don’t want him getting into debt. He will be devastated he even says if this invention does not go through he will not want to live anymore. He is so stubborn I can’t talk any sense into him. Any advice?