Been awhile since I was homeschooled, but my parents used Seton's program the first year or so. After that they realized it didn't take much to assemble a curriculum. I have no idea what Seton's costs would be these days, though!
Dave is the keeper of the homeschool ping list! Should be able to get some discussion going. ;-)
I have to admit, I gave up on the Seton. They sent me 4th grade math when I asked for 5th grade, but sent me 7th + level reading material. Wonderful material for English, but found I had to basically start from the beginning in the middle of the year, because Erin wasnt getting certain concepts. I do love that they use the Voyages in English though. I was very impressed with that.
The history and science I basically had to go elsewhere because I found it incomplete.
Am really looking foward to the TRISMS/WTM curriculum.
Dont have a clue as to how Seton compares costwise to other curriculum.