Exactly. A 3moa steel plate doesn't give a crap if you have a GAP Tempest or a Savage Model 10 because that hanging tire you are using as support pretty much makes all guns equal in those short ninety seconds.
Only place you can't skimp on is a FFP reliable optic with matching reticle and turrets. A few years ago these were mostly north of $2-3k, now we have the Burris xtr2 (4-20 horus at wanstalls for $1199 last month), the Bushnell dmr2 ($1317 at Prohet last week), and the NF SHV 4-14 F1 for around $1600. Any of these will take a dedicated shooter a long long way.
Definately don't cheap out on optics especially as stated here that you can get good quality optics for alot cheaper than they used to be. I shot my first match with a SFP nightforce and while I managed a 3rd place finish I quickly made the switch to a FFP optic and haven't looked back.