How to charge?
When it comes to paying for an item that involves sewing - I would much rather pay by the inch or by the completed item.
Why? Because I am extremely slow - and I would not want to pay someone else for three hours of work to make one simple 9-patch block.
Some people can create a quilt from start to finish in hours - it takes others "ages" to make a similar quilt.
It does make sense to have an idea of how long it takes "you" to do/make something - and charge accordingly.
So - if it takes one person 40 hours and another person only 20 hours to make similar quilts, what is a fair price to charge for labor?