A 12 lesson letter study course is available on estate planning. Take a look at the second lesson at http://lorain.osu.edu/ag/Lesson22.pdf which addresses the cost of settling an estate. The lesson ends with the following table that suggests possible savings for a couple with the simplest planning.
If you would like all 12 lessons, visit http://lorain.osu.edu/ag/pg1.htm for enrollment and other information on the letter study.