All of my suggestions/advises are based from my friends and acquaintances experience, which I'm glad to share it with you. All of these are a friendly and not LEGAL advice, it's for your own information and consideration only. I am not liable for any loses or damages arising from your decision/actions.
Please do take note, I am not an lawyer or studied law and definitely not from Singapore Government. The best thing you can do is to ask the Singapore Government body for any legal questions related to your case.
Of course, I'm very much open to other questions that are not related to immigration in Singapore. I apologize if you're not satisfied with my answers, I'll do my best to catch up with you.