that doesn't work; you can't throw them by hand. You can,, they just don't go anywhere. I had a friend that I brought to the range who throws a 90 mph fastball to throw one, it just flipped out of control after about 20 ft of air.
$20 is stiff; i pay $9 for a range fee that lets me shoot anything at lots of different targets (short range handgun, longrange handgun, short range rimfire, longgggg range centerfire rifle, and shotgun range). YOu get unlimited use of spring powered throwers. At another range i pay $18 to shoot my handguns (but its a really nice, interactive targets) and $6 for a round of trap or skeet.
I'd find another range If i was you
Chase