As for "service life"... I believe that the Girsan and Ruger will each provide much more life that most anyone would have reasonable need.
Recently, I have started to shoot USPSA matches. Serious shooters, even at the local club level, will shoot 200-300 rounds minimum per courses of fire each weekend. Often, they will shoot a second time around. This means 400 to 500 rounds per week just in match shooting without practice or other playtime.
The people I know who shoot Berettas will replace springs and locking blocks on a fairly regular basis, ie, 7000 to 10,000 rounds on the recoil spring, 20,000 rounds on the locking block. There are people routinely getting 100+ thousand rounds before failure. Replace the part, maybe even a $125 barrel, and you're good to go another 100,000 rounds.
I don't see 30,000 rounds as all that many, in the big scheme of things. Especially when you compare the average price of 30,000 rounds of 9mm being approximately $6,000 (assuming $200 per thousand) to the purchase price of the pistol!
As for carry, these are not "small" concealed carry type pistols. They are more in the mode of compact duty weapons. That said, I carry a Beretta 92 Compact in a OWB holster very successfully. Others carry IWB and are happy. I find the biggest constraints to CCW is the overall length of the grip and the total weight of the setup. A good holster and belt solves the weight issue. Positioning the pistol comfortably at my 4 oclock with a decent cover garment solves the printing issue.
Neither the P94 or the Girsans compare to a Kahr or other subcompact for strict concealed carry. Then again, the P94 and the Girsans, in my view, are much more pleasant to shoot. And, let's face it... fun shooting leads to far more practice, which leads to higher skill sets.