It depends on lifestyle, of course, but .....
Im around that money, but with house allowance included, and single, and I can do it, but....
If you plan to rent a basic HDB flat, you will spend like 1.5K in a not so great location (going to west, east or north), so we have already spent like 18K only in housing. If you want an apartment, expense will be much higher, of course.
Then is the school fees. Dont know too much about that. And of course, different if you join local or international, but is also some money to count.
Then, let us know if you plan to have a car and if the answer is yes, I can already tell you that.... no way! If the answer is no, think about how are you going to travel to work and so.
Good news is that with that income, taxes will be like 1K per year
As usual, we need more information about what do you want to do and how do you plan to live. Also, of course, make a comparison with your lifestyle now in your actual place. This is a bit over the average local income, but you must think really seriously if is worth enough to move to Singapore.