The shouldered vs barrel nut comparison continues.
To draw my own conclusions I decided to buy an ARC Nucleus and put a McGowen w/ Barrel Nut on it and also bought a Bighorn TL3 and put a Hawk Hill Shouldered on it. They are both in 6 XC and they are both extremely accurate. Prior to my adventure I asked a number of barrel manufacturers this very same question and the dominant answer was, "It doesn't matter." These were all big name manufacturers and my own experiment and experience has led me to the same conclusion.
For a shouldered pre-fit you're going to need a barrel vise, an action wrench, and a torque wrench (don't forget an action that is so precisely machined that a barrel manufacturer can make you a barrel without the action).
For the barrel nut system you're going to need a wrench for the nut (dependent upon brand it may be a specific type of wrench or it may be a standard combination wrench), a torque wrench, go/no-go gages, and a means of securing the action in a vise (there are myriad ways to accomplish this so I'm sure they're be plenty of feedback here).
I recognize that they are a significant number of perspectives related to torque but I will follow the recommendations of the people who made the barrel and action and torque to a specification versus the proverbial "One white knuckle," "Two white knuckle", et al. When I hear people say that, "Torque doesn't matter" I cringe because it does. If it didn't, be the one to barely screw a barrel in and go to the range. Just let me know when you're going to do it because I don't want to be anywhere near you.
The bottom line is that you're going to have some additional expenses that aren't related to the barrel and action (wrenches, go/no-go gages, vices, etc.) and that's the way it's going to be. I don't think that any of us are into firearms, shooting, reloading, gunsmithing, etc. solely for the purpose of doing something in the most economical manner possible. Venture out and take a chance on the thing YOU think will work and do it. If it doesn't work, sell the "experiment" and try again until you're satisfied with the end result.