I try to be grateful for what I have (a working vehicle), and not measure my worth by the dollar value of my things. Since my divorce started I've been learning to live simply and clear out a lot of this physical and emotional clutter. More "clearing of the debris" I guess. The only people who care what brand new car you drive are YOU and all the awful folks playing the "keeping up with the Joneses" games.
A gentle suggestion is that you might have internalized some of your mom's narcissistic values -- "what will people think of me/us/my stuff?!" I definitely did, and it's something I struggle with a lot. My mom was very focused on appearing normal and successful and moral, by her definition, and some of her backwards-ass lessons are branded deep on me.
A great lesson I learned here on SR is "what other people think of me is none of my business." And more realistically, in my experience, other people don't really think much about me at all.