Ami, I am pretty sure you do not have to be physically present in Singapore to set up a business. It'll take an extra week or two to do the operation online, but I'm pretty sure you don't have to be physically present. City states like HK/Singapore have forged themselves roles as international business locations by making registration easy like this.
Even if your clients are EE based, it does not mean you necessarily have to be registered in their country. I would imagine the amount of headaches you'd have to deal with would make it not worth it.
Even if your clients are EE based, it does not mean you necessarily have to be registered in their country. I would imagine the amount of headaches you'd have to deal with would make it not worth it.