My wife retired from the Air Force and took a quilting class. She'd always wanted to learn to quilt. It cost me a new sewing machine, some fabric, and the cost of the courses. Over time she went to work in a quilt store and started teaching quilting. This cost me a newer, computer driven sewing machine, a sewing machine cabinet, more fabric, and taxes on the paycheck she never brought home. [It also cost our youngest son his room when he went off to college.] We moved to Texas and she joined the quilt guild. This cost me a long arm quilting machine that took up the spare bedroom. The other extra bedroom was already full of sewing machine, cutting table, and more fabric than most quilt stores have. Then she became program director for the Guild which cost me a new sewing room (I got both of the bedrooms back though). Now she officially has more fabric than any two quit stores I know of and a newer model long arm quilting machine. Oh yeah there are 4 oak and glass quilt boxes in the living room, too. So far she has gifted quilts, donated quilts, made birthday quilts, made baby quilts, worked on raffle quilts, but hasn't sold a one. I'm afraid if she started making things to sell I'd never be able to afford it.
On the plus side, we don't compare the costs of our hobbies, she's so far ahead I'll never catch up.
Steve