I don't want to spend money on clothes that don't last.
ーI don't like to buy clothes that wear out soon.
「すぐにダメになる服を買いたくない」
clothes that wear out soon で「すぐにボロボロになる服」
ーI don't want to spend money on clothes that don't last.
「長持ちしない服にお金をかけたくない」
to spend money で「お金をかける」
clothes that don't last で「長持ちしない服」
ご参考まで！
カナダ 
