That PPK/S in .22 looks very nice, but....if it doesn't work out for some reason, you might consider the Keltec PF9 with a Twisted Industries .22LR conversion. I know, I know..."Keltec = junk", what a lot of people think. But bear with me a minute.
I've had my PF9 for about 5 years (and about 4K rounds thru it) with no problems, no misfeeds, no FTE, no FTF. I've purchased an extended mag for it (8 rounds vs standard 7 rounds), and the only problem is that once in a while the slide won't lock back on last round in that extended mag.
Just a few weeks ago, I received the TI conversion kit (slide, recoil spring assembly, barrel, mag), and it was a 2 minute conversion: 9mm slide, recoil assbly & barrel off, .22LR slide, recoil assmbly & barrel on, load ammo into .22LR mag, ready to go. Shoots well with most ammo (although they suggest CCI Mini-mags), accurate (for a pistol with small sight radius), and most importantly, I can practice WITH MY CARRY GUN using cheaper .22 ammo.
Swap the conversion kit out, and I have my 9mm carry pistol back in action...best of both worlds!
Yes, you might get a PF9 "lemon", but you send it off to the factory, and depending on what the problem is, you may just receive a new pistol in return. Spare parts are inexpensive (I purchased several front & rear sights for experiments at $1 each from the factory). In fact, I do a lot of experimentation with the pistol since it's so inexpensive; wont' do that with my more expensive pistols.
Just a thought...