Many people inquire about body donation programs like the Stanford Willed Body Program.
If you are concerned about the cost of cremation, you may consider donating the body to Stanford for research. You will then receive cremation for free, and the ashes will be returned after the study period which may range from one month to two years. Not all medical schools return ashes, so before reaching out to other research universities be sure to check that you will be able to get the ashes back.
If you donate your body to science, you can still use Better Place Forests to create your memorial.