I just spotted the request for saving on home school stuff. I told people what I needed, and a church donated some. Other home schoolers offered me their used books at low prices. I also got some books from former teachers, and in thrift stores. In the early years, I used many Golden Step Ahead books from the stores, and then erased and reused for the next child. I made up my own quizzes for some books, lots of work but saves money or trying to find the teachers version of a discarded public school book.
I hope your kids turn out as well as mine. All three now have jobs, vote, pay taxes. They all have had some educaton beyond 12th grade, but also all know how to learn things on their own for free. They all have many survival skills, even though two choose to ignore some that knowledge.
For all homeschool moms, but also for others: Teach your kids how to work. Public school does not teach this, and it is such an advantage after you kid lands his/her first job. With the work ethic, they can keep the job, without it they will prolly get fired or just quit before long. Meanwhile, if your kids help around the house, you will be able to do more to stretch a buck, and it gives the kids self-esteem. Even a tot can do something useful! I started with having them fold washcloths and pair (some of) the socks, and fetch diapering supplies for newest baby. Add other age-appropriate tasks as your child grows. Best of all, kids who have chores to do are much less likely to come whining "I'm bored," because they soon figure out what you will recommend. I made most of the early chores things done where I was, part of what I was doing, so it was easy to supervise, made them feel important, and kept them from getting lonely/bored somewhere else.