Actually, in a dry-fire environment with "snap-shoot" posture, you can begin to develop the reps leading to muscle memory. Air soft or green gas could be cost-effective too and happen literally anywhere.
And then doing the same with live ammo - but with your eyes closed - can shed a lot of light (no pun intended) on how well you hit with your natural point of aim "up close." Adjust accordingly so by the time you start using your eyes, it's more to see the threat and the next threat than it is to "align."
Just a thought. Great training though!