hi, i visited Singapore last June and throughly enjoyed my stay there... luckily I had my bro there and so the entire accommodation and food was free for me.. ;-) however, from what i heard, accommodation is little bit expensive. Even the cost of living is comparatively higher that Qatar. If you can spare a week's time, then you could cover all places in Singapore. If you need any help in finding a affordable hotel, please PM me and I will get details. Also, I suggest you to stay for a couple of days in Malaysia coz its better than Singapore.