Mom's cremation and burial

My mother has fought a very long and hard battle with cancer. She was given six months to a year 2 years ago. She lost that battle on June 7th 2017. Unfortunately she did not have life insurance and my family including my father are on a very fixed income. Instead of being buried in the normal way she wanted to be cremated and planted with a tree on her property so as the tree grew so would her presence. My mother was a very loving and caring woman who would give her shirt off her back for anyone even if they weren't family. Most people would like to send flowers at this time but per my father and I request we would appreciate a small donation to help us in this hard time. Thank you in advance.