Ive built about 40 rifles and the most cost effective way to build a poor mans Custom rifle is grab an used Kimber Montana in your desired action length, 84M, 84L or 8400wsm or 8400 Long Action,
They have an excellent adjustable trigger, and all stainless action and a Kevlar/Carbon Fibre stock so it has all the components in one package other than a barrel,
buy your self a #2 Contour Bartlein, Benchmark or HawkHill barrel and have your Gunsmith.......
True,Square and bed the Action
Lighten the trigger to 2.5lbs
Chamber barrel to your desired caliber and your all set with an excellent all stainless lightweight custom hunting rifle.
Probably no more than 1400-1500 dollars all in depending on the price of the donor rifle, barrel and labour
Ive built several with the Montana as a donor and they are 2nd to none as a hunting rifle, here's my latest 300 PRC on a Montana 8400 LA I just picked up this morning
You can also use a Tikka T3x or Sako A7 which is a good platform but there stocks aren't the best, other than that they are a great donor.
Hers a 6.5 PRC built on a Montana 8400 WSM donor
Heres my first 300 PRC built on a Montana 8400 LA
Heres a pair of 6.5-284s built on Montana 84L actions
Here's my sheep hunting rig 6.5-284 built on a Montana 84M short action