My husband and I faced a similar issue when we remodeled our 2nd floor. We had to put in all new windows and, due to code, could not put in double-hung in the bedrooms. We worked with Schaaf Windows (south suburbs) to create casement windows that looked like our double-hung. They look great from the outside and inside and were affordable. I am not a huge fan of casement windows, but for us it was the best option.
~Megan