Solid-wood or plywood frames typically outlast particleboard options in humid conditions significantly. Untreated leather grows mould if you don't wipe it regularly and ventilate the room. Rubberwood is usually a common affordable hardwood suitable for local weather patterns and longevity. Dark upholstery hides stains better than light fabric covers which shrink if washed hot.
Queen frames measure 152x190cm and fit most HDB master bedrooms comfortably. Leave roughly 60cm clearance on the exit side for easy movement around the mattress. Standard HDB doors are about 91.5cm wide, so check lift door limits before delivery. Buffer of 2–5cm ensures frame passes through corridors so you don't get stuck.