Just ran a few this afternoon on the patio. Not sure how much money is saved. I made nine shafts from one six foot pine board that was a few inches wide. Could get a few more out of it but have had better luck with a full 1/2" blank. I don't have a spine tester, so I guess ignorance is bliss.
I can pretty much get any set made so far to shoot in at least one of my bows with a little adjusting to the shelf depth, arrow length and point weight. They seem to shoot pretty much the same so the spine can't be to varied.
The ones I made today will go into arrows for the grand kids. I do save a lot in $ but the time that goes into it would make it a loss if time were counted and valued.
For my own arrows I look for straight grained doug fir with as tight a grain as possible but plan to try some poplar next time around.
The local shop can sell me one dozen 11/32 compressed cedars matched within a few grains of weight and a few pounds of spine for $42. I thought that was pricey till I discovered what it would take for me to produce a set to equal that.
When I shoot my own shafts alongside my closely matched "store bought" shafts, the groups shot with the commercial shafts are about half the size of those whot with my home mades.
Still, I'll keep making them just because it's a pleasant process and I have the time. You may or may not enjoy it but you can find out for about the price of a dozen shafts.