My recommendation would be either a 280AI in whatever rifle you'd like inside your budget as.1) All ungulates to 400 yds (deer mostly, but elk, moose, etc will almost certainly be tackled occasionally).
2) Steel and paper to 800 plus (occasionally out to 1200 just for giggles on big targets).
3) $1500 for scope and rifle.
4) Factory rifle most likely (see #3).
5) I'll load for him, perhaps indefinitely, but reasonably common factory ammo is a must.
6) He only hunts with lead free. So it needs to have a good factory option in copper (see #5). He's cool with slinging lead at paper/steel, but verboten on animals.
7) He can handle recoil, but I'd like to steer him towards "a bit more than minimum" that will get the job done, so a factory rifle with a brake is a high priority, but not a deal breaker.
So...
Rifle?
Scope?
Cartridge?
I have my own opinions, but would love to hear from the peanut gallery. Just stay in the lane. None of the above 7 points can be violated and keep him happy. He's not a high volume shooter, but I'd like to push him that direction, so keep economy in mind too.
Or preferred option would be an M700 pattern rifle like the Bergara B14 hunter in 7 Rem Mag. Lots of factory options, but specifically for the reloading advantage. If you get the chamber throated to accept a 3.5"-3.6" coal then you can push a 175gr bullet upwards of 3100-3200 fps without upping pressure. That will give you back the advantages the 7 Rem Mag should always of had from the beginning.
My personal rifle is a 7 Mag setup that way and I'm running 168 Barnes LRXs at 3100 with a coal of 3.5" and a 26" barrel. For reference the Barnes load data states a coal of 3.34ish and velocity of 2850 max, which a 280Ai will do all day, so if you want to get all the performance in a 7mm, go with a long throated Rem mag. Otherwise I think the 280Ai would likely be your best all around rifle.
Extra options, a 300 or 338 win setup the same 3.6" coal as the 7 Rem mag option I stated above would also be a viable choices as well.