I made a double knit quilt in the 80's when I was teaching myself to quilt. I still have & use it. Wears like a dream. I didn't have any raveling at all, but when I cut it out I used pinking shears. If you plan to rotary cut, you can buy a wavy blade to cut with....that will take care of any ravels.
Made if from my MIL clothes that she out grew!
Hope this helps you.
So sorry to hear of your son's loss.