Gifts shouldn't be about breaking the bank. Gifts are to let someone know you are about them and you are thinking of them. What says that more than something specifically made for them or chosen for them because they sew? Sure, you can save money by sewing but the gift you create has so much more thought in it that it is going to be treasured for years. The occasions to sew a gift are endless!
What could tell Dad how much he is loved and appreciated, more than a homemade gift that he can actually use. You'll find many options using free patterns that are bound to bring a smile to dad's face here.