There are three parts of the funeral liturgy, and only one of them is necessary- the committal to the ground (or thereabouts). Everything else, including the Mass, is optional.
Here’s a great web site on the issue:
http://www.stjudefw.org/liturgy/funerals.html
That said- If you are trying to get closure, have memorial Mass said on your own.
My father-in-law absolutely refuses to have what he calls “the whole nine yards”; partially because one of his sisters had a “Catholic” funeral that looked as if Cecil B. DeMille directed it; partially to spare his wife, who is not Catholic; partially because he considers it a burdensome expense. So, his parish priest will bury him at the cemetery, and that will be that for his current town of residence.
That is not stopping my husband, his cousins, and any of my father-in-law’s sibs remaining when he goes from having a memorial Mass at the parish church where my father-in-law grew up, and a family luncheon after. It will take place a couple days after my father-in-law’s burial, preferably the Saturday after, so that everybody can attend. My husband is gladly sponsoring it, financially and planning it as well.