I would recommend staying in Singapore to continue working. Although the job may not offer high pay or additional benefits like bonuses or 13th-month salary, it still provides a stable income and the opportunity for career growth. Starting a business in Malaysia, especially in the food industry, can be risky and uncertain in terms of income. It is important to consider the financial responsibilities you have towards your family and children. Therefore, sticking with the stable job in Singapore would be a more secure option in this situation.