You can get a feel for what you like, and dislike about a curriculum before investing in an expensive package. And there are some wonderfully comprehensive programs available at no cost.
Free Homeschool Curriculums
Ambleside Online A comprehensive curriculum available free online. The program follows the teaching of Charlotte Mason and includes weekly schedules for different ages. Worth a visit just to look at the book list.
Mater Amabilis A free online Catholic Charlotte Mason curriculum. Again, it is worth checking out the book list.
Old Fashioned Education Written by a Mom who felt that Ambleside Online was not structured enough for her family. Uses mainly public domain books.
The Tanglewood School Curriculum Another Charlotte Mason Curriculum. Provides links for buying the books but you may want to search for online copies first.
Online Public Schools Many states provide a no-cost online public school such as K12 or Connections Academy. The link will let you search for your state so you can see what is available.
More Freebies
Sometimes a curriculum can't provide you with what you need for your homeschool. Why not try these other free resources too.