It's a pretty radical departure from your original line of thought, but you might consider getting each of your four kids their own lightweight, accurate and reasonably powerful Crosman 2023 anniversary special variable pump pneumatic air rifle. You'd be getting four excellent, low-cost ($300), very easy-charging and lightweight .22 caliber pumpers with what should be enough range for young shooters, with good looks (nice walnut stocks) and good Williams peep sights, all of them together for less than the $1500 upper end you were thinking about for the spouse alone (maybe with enough left over for fairly good glass). On the plus side, they are 100-year anniversary edition, numbered rifles. Mine is number four hundred and fifty-something of 2023, I think, and I really love it.
Great little shooter, with three to four easy pumps being all that's needed to reach out to targets up to about twenty yards or so, or all eight pumps for the full power to reach out to their limits (around sixty yards at a guess, although they might be capable of more). They're also great and super-handy pest eliminators (rats, squirrels, rabbits), if that became an issue. Just an idea. If they're anywhere close to the quality of the Benjamin pumpers they somewhat resemble, as I think they may be, each should last for decades. The maintenance on them couldn't be easier and hopefully, they even could last long enough to pass down to their own young shooters. I'll leave suggestions for the little woman to the other members of the board more familiar with the PCP and springer side of the hobby. I'm sure you guys will have a lot of fun. I was the only male child in my family of five and grew up with a BB gun in hand from about 5-on, but everyone could shoot well, my mom second only to my veteran father in skill, and we all shared many good times knocking cans and bottles off fence posts with .22's when growing up. I'll never forget the first time I used the twelve-gauge to eliminate a retired easy-bake oven!
Good luck outfitting your crew, whatever your eventual decisions turn out to be!