Savage 12 BVSS in in 308 or if he has to have a magnum the 300 WSM
308 is much cheaper to shoot and out to the ranges he wants is more than enough.
Add Bausch and Lomb 3200 10x with mil dot for $170 that has about 100 MOA elevation.
Farrel tapered base $45 with 20 MOA elevation.
FA Enterprises tactical rings for $80 from Brownells.
Well under $1000 for gun, scope bases and rings.
You can add Savage bolt handle with large knob for $25 and even change barrels yourself with $25 wrench and $250 barrel from Sharpshooter supply already chambered.