Budget stays in Singapore… paradoxical 😊
Don't go for the bunk bed type hostels. Not worth it.
Ramada by Wyndham is a good option*. Well connected and reasonably close. Location matters.
Holiday Inn Express (3-4 properties) too.
Ibis is an option on lower end of the budget spectrum. They have around 10-12 properties. The further away from the City Center the cheaper it gets.