There are so many great resources on the internet that it is possible to spend very little money and still provide your children with a great homeschool education. Below are some of the resources that I use frequently.
Bible Curriculum
Little Blessings is not a free curriculum but it is well worth the price. I have used the program for a few years and it has paid for itself many times over, in my opinion. The creators of the curriculum also provide excellent customer service.
Free Printables
There are probably hundreds if not thousands of sites that offer free homeschool printables. Below are the ones that I go back to over and over again.
DLTK-Teach
Donna Young
Learning Page
Free Phonics Program
All I can say is that Starfall is a fantastic site to use to teach your children phonics. Children could navigate this site and practically teach themselves.