How to support a large family (more details)?

My husband and I are considering trying for child # 3 in the near future. We have discussed this at length, and have attained full weighed the pros and cons. The only thing keeping us back is cost. At this time two small children, and my husband is a father staying home and going to school on time to get your degree in education. It will not end for another 3 or 4 years at least. What worries me most is how to financially support children. We want to be a family five (three children and two adults) and I do not know how we would. The thing is with my husband to go to school to teach, not make much money in ways that are financially stable, we will never achieve that. At the moment we are still, I'm beyond the point childbearing age. All Tips for parents of large families with an average of (/ media) on income? How can you do? What would you do if you were in my place. I'm so torn now. (

I have four children and her husband is the only thing that works, is 11.50 per hour, we do it ourselves without the help Government you can do, believe me.