The thing about home-based businesses is that most of them evolve around internet network marketing. Of we have read about a lot of "success" stories online but personally i have not physically met anyone who is =P (but having said that, that does not mean they do not exist)
Alternatively, you can try signing up for onine surveys. eg. opinonworld, AIP online surveys, AC Nielson etc... where u can complete surveys and earn points which are redeemable for vouchers at NTUC/ Cold Storage etc...
But remember, I suppose these should only be regarded as a supplement to your income and not the main source of your income.
Good Luck! =)