That's why lights have on/off switches.
Uh no, no way am I recommending a DA/SA gun for this purpose.
To work the original premise backwards, practice ammo is $200/1000. I would buy 147 grain for both practice and "use." The recoil impulse is a bit milder and the heavier bullets are proven to have good results.
Winchester Ranger T or SXT in 147 grain if you're not finding T's are also good. That's another 50-60 bucks. Honestly I would probably buy 3-4 boxes if possible and fire off at least 2 boxes as practice and to test the gun. You're aiming for zero malfunctions. Don't buy any bullshit RIP rounds or whatever, use what major police services use.
Please consider some kind of quick access lock box or speed vault unless you have no chance of ever having anyone else around that could access it.
You'll probably also need to buy some lube and patches, the gun will likely come with a serviceable cleaning rod and brush. $40
After that, basically shoot or handle as many of those guns on your list as possible. I would avoid the P220/P226 due to the DA/SA trigger issue.
Think hard about including a mounted light, holding a light and a gun will destroy your accuracy. You can get a serviceable streamlight for around $100-$125.
I think about $500 of your budget is gone on ammo and basics, another $100 or so if you need a lockbox. Subtract $100ish if you don't get a light.
$600-700 will get you a good polymer striker fired pistol, but get what you shoot well. Much better to go over a bit than cheaping out and regretting it. If you get the light all your practice should be done with the light on the gun.