When she passes, we will take her ashes and his and spread them somewhere - I'm not having ashes in my home - not because its gross, but because when I die I don't want to burden my kids with "what do we do with the ashes of an uncle we barely knew who died when we were in middle school" My kids aren't sentimental and there is a non zero chance Uncle and Grandma would end up in a landfill somewhere. I'm not sentimental either, but I think a scattering of some sort is more respectful.
The rest of the cost was a reception/wake at the funeral home - we had to rent the space, and had about 200 people - we had coffee and lemonade.
There was no service - so nothing to a church or minister.
So expect funerals to come to a little more than $35

You can get by even cheaper than we did if you don't do a wake - or don't need a big space for it - my brother in law was young with a lot of friends.