My mom who had terminal cancer pre planned her funeral, it was a a huge help to us as none of us lived in the town she lived in so when she passed we did not have that task to take care of. My sister went with her to the funeral home, they chose the casket, music, time, length of service.
My husband and I just purchased our burial plot this year after seveal years of 'discussions' on my part...I finally guilted him into buying the plot. This coming year we will purchase our stone.
We are Christian but we do not want a formal service. We will both be cremated and possibly a graveside service. Both of our families are small and most likely because of a large age gap I will be left to handle his service and I am not the type of person/personality that need a lot of people around me during difficult times. I have already taken some flack from a few people about not wanting a service but hopefully I am able to stand my ground when the time comes. I will be writing down our wishes and putting that information with our important papers...and let his daughter and my niece know where that information is in the house.
If you don not want to pay for your service right now, I would write down in a book exactly what you want and your children would know where that information is.
We had a friend that had his funeral planned, down to the smallest detail. It was a lovely service....just not what I, or my husband wants.
I will be interested to read the responses to your question.