I will also have a 12 hour layover in SIN and wondering where the best place to stay is. The airside airport hotels are way too expensive for me ($300). Does anyone know of any sleeper lounges or cubes? I've heard about them but don't have any details for them. Do you have to book in advance? How much do they cost? Are they truly sleeping lounges or merely reclining benches in general boarding areas?

I will be flying economy SFO-PNH via SIN and landing at 7pm, so having an affordable place I can sleep in for the night would be ideal.