Bleg for Info

I'm looking for a scope to mount on my Sub-2000 and due to personal preferences, ergonomic comfort of my mother, and the configuration of the subbie, I need one with the following qualifications:

1. It must have a quick-detach mount, so I can fold the S2K for storage and cleaning. 
2. It needs to have sufficient magnification that I can reliably hit bullseye from 50 yards.
3. It must also have a way of mounting a reflex or holographic sight above the scope, for close-in home defense work. 
4. It cannot cost me an arm and a leg, so no recommending a thousand-dollar Leupold HAMR scope. Somewhere around $100 is good. I can go higher, but not much. 
5. Ideally, it should be American made, but I will settle for Not Chinese. I realize, however, that this is probably contradictory with point #4. 

If you can recommend to me a scope that has most of these characteristics, I will be very grateful. Thank you!