Best just retired.
1. Write it basically yourself. Sit on it then study and revise.
2. Consider an Estate lawyer with at least 10 tears experience
3. Consider a Revocable Trust, they're not just for wealthy people and don't cost any more (my last revison was $400)
With a Revocable Trust are no lawyers needed for probate.
4. Free Will and Revocable Trust forms and samples on internet. Read a few you may find things you haven't thought of.