I'm not so sure...he can still get the Remington 700BDL or a Savage 110 series in .30-06 from Wal-Mart or K-Mart that shoots very nicely.
I've taken 2 elk in 3 hunts, one with my .270 custom and one with my .30-06 Remington 700. Both rifles (scopes, slings, etc.) came in under $500.
The real answer, though, is to shoot a couple of rifles to see what fits you best and doesn't beat you up when shooting. That allows you to concentrate on shot placement, not recoil management!
I got my Moose on Union Pass in Wyoming back in the 70s using a FN 30-06.