If you decide to rebarrel it, the gunsmith bill for a setback and rechamber is going to be the same as if you rebarrel it to start (barrel cost is the only change in price).
Personally, if you're going to occasionally shoot long range and shoot deer and foxes with it, I think you're going to find that 7mm RM WAY overkill for it.
Keeping the same Mag bolt face you might think about one of the short mags like the SAUM or WSM series in 7mm. You can load them light for good range on a small animal like a fox, you can stoke it a little harder for deer, and you can pour on the coals and shoot distance with heavy bullets seated long in the case.
Personally, unless you're doing the work yourself I would not have that factory barrel rechambered. I'm planning to take a 243 barrel and open it up to a 6mm Rem AI, but the barrel was given to me as a take-off with about 1000 rounds down the tube. I want to try the 6 AI a little before I go off and spend the $300 on a Bartlein or a Brux, and I'm doing the work myself so I think it makes sense in my situation.
I would not advocate such a path if you're paying someone else to make the chips for you.