Although the apartment was not very big, it was acceptably clean and comfortable enough for 2 persons with a big comfy queen-size bed, kitchenette (with utensils provided) and bathroom (with amenities).
With the average flight to Seoul from Singapore costing about S$1200++ per person (and that’s just economy!) on Singapore Airlines, getting tickets on promotion are definitely worth it.
Volando Urai Spring Spa and Resort (馥蘭朵烏來渡假酒店) is located in New Taipei City (Wulai), close to to the Wulai Town (and waterfalls).
While this trip was a simple and short one, it wasn't necessary one of the cheapest: this trip was one meant to enjoy the hot springs and just take it slow (and basically be pampered).
Bangkok would have to be one of the places where things are cheaper, much cheaper than in Singapore and a shopping paradise for the shopaholics (who like to get things in the bulk and cheap) out there!