I know I am going to get flamed here but if his main concern is ccw then the kel tec 911 with belt clip is ideal. I have gone through many guns in my years looking for an optimum gun for carry.
The p11 is 14 ounces and when loaded with 12round mag and one in the chamber it is a bit less than a glock 26 with empty mag.
The trigger is revolver like and is definitely long and heavy. So AD isn't a concern while carrying.
It has a good reputation for durability. It has 3 inch barrel. Being that light it is a bit to hold on too but that is mitigated with a gee plate mag base. It truly locks the gun in your hand and helps withh perceived recoil.
He can use the rest of his cash for ammo .
Oh he can get a smith and wesson mag for 15 round back up mag if he would like.
https://youtu.be/Ncrh1jUF3uY