My dad has bad teeth , HELP!?

My dads teeth started to dwindle away years ago because of stress , and bad dentistry he is 50 years old and his teeth are horrible , he doesn't have any chewing surfaces in his mouth other than his front teeth. (He suffers every day yet he rarely shows it) and he really don't get good sleep.. We don't have enough money to fix his teeth , and i don't want him to wear dentures , he is still too young to lose his teeth and still in decent shape. I dont know what to do I want his teeth to get fixed really bad. He dont go out as much any more because of how self contious he is. I want my dad to have a teeth make over but I highly doubt that will ever happen. I cant emphasize how its changed my dads life and how he can't really enjoy foods and how he is sick sometimes because of it. We are in a situation where we can't afford a great dentist and the work that goes with it and my dad is really scared of going to to the dentist because of the **** jobs on his mouth . So please any suggestions on how to completley get my dads teeth fixed i would be really happy.