I personally think you are undercharging, also be sure to give the estimate before you begin or purchase anything to start. I recently was gifted two antique quilt tops. The person who give them to me is a close family friend. I felt they should stay in the family though, called her son and offered to longarm them for him and his wife which include batting thread etc. Oh yes they would love to have them. When I quoted them the cost for two quilts, just over $300.00 for both. they were around 80x90 each. He backed out in a hurry. So I will keep them and enjoy them myself.