We'll have other car next year

Hubby said that he’s going to purchase some auto accessories for his car so that whenever we trade it in next year he can increase the market value of his car. We need to get another car that has more room inside because our family is getting bigger and besides sooner or later my parents will be coming over from the Philippines, so all the more reason that we need a bigger car. My husband is kind of unhappy about idea of getting rid of his new car, but what else he can do? We need a bigger car for more room.