We have no grandparents and no relatives to help with and need to pay the houseload as well. However, we have three kids to look after. I think it depends on how much you're going to sacrifice for the kids.....not everyone can do it!
Yes. I have to work to support the family expense. Luckily we have a good maid to look after the kids. But still it's not easy!
I know in your case, your kids are all very young which will be more difficult for your family. However, you don't have to pay the rent and you have also got someone to help you with the kids. So it's still OK to have 3 kids for you. The most hardest time will be when the kids are under 2 years old. May be you should consider to work only part time during these two years. Good luck!