你去google 搵 Singapore, family of 5, 就會搵到多少少資料. d 外國人都話難搵酒店, 佢地去住hostel (YMCA) , apart hotel (多數要住得過7 日至俾book), mira inn (好以咁串) 等, 呢d 地方應該冇乜港人會考慮. 佢地好似數去stamford, holiday inn 住.
I just booked Village Hotel Katong by Far East Hospitality, family rooms with 2 queen beds with free wifi. around HKD1.7k per night, included tax. Many good comments in tripadvisor, and your 3 kids should be ok ga.