Hi Brian. Welcome aboard. The 2-rail Sunset CNW H1 is rated at 54" minimum radius, but you might be able to pull off something indoors along the ceiling at a 60" radius curve with adequate roadbed support. I have a similar situation I'm trying to work around. Like Sunday Shunter said, lack of space is just a challenge to your imagination.
By the way, the H1 is a beautiful locomotive (I have the 3-rail version and almost bought a second one in 2-rail).