The key factor to think about when ordering sets of equipment for teams and facilities is:
How Many Athletes Are Training At One Time?
You can save on equipment costs by having fewer athletes training at once. Internally, we use a simple rule of thumb for figuring out how many sets of equipment a coach might need to equip his team:
PlyoCare Needed = Athletes Training/2
Weighted Balls Needed = If PlyoCare Needed < 4, WB = Plyo; If PlyoCare Needed > 4, WB = Plyo - 2
Ok, so that's math. Let's take the math out of it.
|Pitchers||PlyoCare Needed||WB Needed|
There are other issues to consider when structuring a practice (namely how much space and how much time). But this should give you a good idea for a rule of thumb.
Team Set: Perfect for a staff of 10-14. It comes with equipment only.
Hacking the Kinetic Chain Starter Kit (Ages 14+): Perfect for a coach starting out the program with 2 pitchers as a test.