I think the Harris home was pretty standard for the area. His dad probably had money from the military and more than likely made a good living.
Sue talks about the house and their financial situation in her book. The area they lived in is now filled with million-dollar homes and according to her book they had a LOT of work to do on the house, so it was not necessarily as nice as the others in the area. They were probably considered middle class/upper middle class.
They had more money than me growing up that's for sure.
"And you know, you know, you know, this can be beautiful, you say you're numb inside, but I can't agree. So the world's unfair, keep it locked out there. In here it's beautiful."