Costs to true an action are going to range 250-400ish. Rebarrel and chambering are going to run 2-300ish. That is not including the cost of the barrel which are 2-400ish. If you get it all done at the same time by the same Smith you may get a bit of a break.
It would not take too much imagination to see that you are quickly getting to the cost range of a Surgeon, Bighorn or similar precision rifle action.
Are you a serious enough shooter to realize the small gains to justify the expense?