Most hated question about your car?

I was talkin to this guy at a flea market. He had an old maverick. I told him I was working on a 75 Duster. So he says " your gonna have 20 thousand into that before your done" I said maybe and walked away. It didnt bother me at first but later I got to thinkin. What was the guy's point. Does he know how much Im gonna spend, NO. Was he infering that a 75 Duster is not worth spending money on, probably. The point is who cares! To a car guy, putting 20 grand into something is not the point, it's the experience that matters. Besides, 20 grand spread over 4 or 5 years really is not that much an on top of that, I will have way less than 20 grand put in this car. I really dont understand how people think they know everything and assume you are a moron for wanting to fix up an old car. And by the way, my son was standing right besides me who is very excited about the Duster. He is 16. That one comment really bothered me though.