Ask a grandchild to do it, or, if that's not practical, ask a neighbor's kid. Works for me!
I wanted to get into family tree stuff a few years back and was astounded at the cost. It's understandable, when you think about it. You have to be ready to put in a LOT of time, too.
On the positive side, one of DH's cousins did her family tree and came up with a lot of relatives she keeps in touch with. I'd love to be able to do that!