not new but took a LONG break

i live with my grandparents and everytime i would buy a part they would always say im wasting my money i'll never finish the car. and it always discourages me. i'll be 19 thursday

If you earn your own money than it's your business what you do with it.I can however see their point of view.I'm sure they would like for you to be able to completely support yourself.But if you have invested in the car it's also beneficial to finish it or get it to a stage where it's actually safe and driveable. Ever try and sell a project car? Not much value there unless you started with a highly desireable vehicle.Best of luck in whatever you decide.