The five reviews on this weapon state that it is a fantastic shooter. The first reviewer states that he's getting 1" groups at 25 yards ! This gun looks so good that I think I'm going to get one myself. How much it costs to shoot depends on how involved you get into this bp. addiction. The occasional shooter who buys his bullets and flints, lube and patches ready made will pay more per shot than someone who likes to make his own ( of course you don't "make" flint but knap rough flint to the size you need ). Figure $15.00 for a pound of powder, 7000 grains. At 40 grains per shot that would be .08 cents. 100 lead balls of .58 caliber at $14.00 per 100, .14 cents each. Pillow ticking patches, 100 for $3.19, .03 cents each. Flints, figure $14.00 or so for 3. Depending on the flint, luck and circumstance, you may get 5 shots per flint, maybe more than 20. Crisco is a cheap lube, "free" if you steal some from the kitchen. So not counting flints the grand total would be somewhere around .22 cents per shot, or about the same price as a 9mm J.H.P. Casting your own bullets, cutting your own patches, would bring this price down quite a bit. Either way a pound of powder would last quite awhile. If you use real black powder, you could even screen out the fines for the priming, which means that you'd only need one granulation instead of paying another $15.00 for ffffg.
Most states don't require an ffl for bp. guns, although there may be local restrictions. I bet you could get it shipped right to your door without any problems.