Personally, I do consider my relationship with the person who is asking for the quilt. Currently, I am working on a tshirt quilt for someone on at work's daughter. I do not plan on charging anything. I know that is against all that people will want to hear, but this coworker has helped me with things that I have never gotten to pay them for doing. Both the daughter and my coworker say they are going to pay me, but I will not take money.
Also I consider the fact that I will be sewing on something anyway - I am sort of sick in the head with sewing ha ha. I don't sew to make money and I know that I will never be able to support myself by sewing nor will I ever be able to justify the money I spend on quilting ha ha ha
So if I can make a quilt and the person is paying for the materials I may very well be happy with that. That will keep me sewing and I won't have to spend any of my own money ha ha ha
I also realize that I am far far from an expert so I appreciate having the quilt to practice my skills
There have been times that i have charged to make quilts and I will charge others in the future as well. When I have charged for a tshirt quilt the customer purchased all of the materials - then I did not have to put any money out Then I charged $200 for my time
Just my thoughts. You have to find what works for you