"Anyone who considers themselves a serious student of the Art should have an inert pistol of some sort. You can use it to practice things you can’t safely do with a real pistol. A SIRT gun is an ideal tool for this but not everyone is willing to spring that kind of cash. For less than the cost of a box of ammo, you can get a training aid that can be used in many different ways."I agree wholeheartedly.
I would go further and suggest an inert duplicate of your actual carry gun that allows you to use your carry holster is a sound investment.