I don't have anything original to add... just echo the thoughts of everyone else!
I have 4 kids and there is no way we could afford to put more than two through daycare.
Plus I also LOATHE the idea of someone else raising my children. Over the years, my husband and I have swapped out who is the full time "worker" but always managed to have one of us home with the kiddos.
I am also a huge control freak, hahaha. I love being my own boss, and not having that thumb on the back of my neck telling me when I could come and go, take my vacations, how much I would earn, etc.
As someone else said; this "job" has it's fair share of challenges (mainly dealing with various parents) but the good FAR outweighs the bad, in my opinion!