TexasCHLforum.com

You are doing this for income right?
I'm a marketing guy. Here's what I'd do:

Pick a gun out at your dealer of choice, and decide how many to buy.
Seek out the manager, explain what you are doing.
Tell him you want his absolute best price in exchange for marketing:
At each class you tell them you have guns available to rent, show them the pistol, explain the features/functions, and tell them the price and where to get them. Offer them a card from the store with your own stamped info on the back. If possible you could have the store information put on the gun somehow.

Then rent them for $10 plus sell them ammo.

You might even work a deal to give them their rent payment back as a $10 coupon toward the purchase of the gun at the store. that would give the store manager additional feedback.