A memorial and a bag of ashes is cheap and very beautiful.
When my friend Nancy died every thing was hard for people ,including her husband, to get things together for a gathering very soon after her death. So a date for a year later gave everyone a chance to plan to get there. We had a chance to think of her. We made a potluck and those of us who had never met each other before from different times and places introduced ourselves and told Nancy stories--She was a real character. Then her husband John put her ashes over the meditation garden she had made with rocks and planted on the hillside by their home in the woods.
Only thing we needed was some good music!