A Lyman kit is easy and my last one took me about a week and a half worth of sanding, staining, and metal finishing for an hour or two a day after work. That one I bought about a year ago and cost me right at $400 plus sandpaper and stain. You can't go wrong with these and they're great shooters. A TC is just as good, but the feel is different, mosre like a modern rifle with less drop in the stock than the GPR has. These tend to go for anywhere between $250-$400, depending on your timing, luck, and probably region. While I have a CVA also (made by the same people that make Traditions), and it is a good shooter, with your budget, I would pay the extra few dollars and get the much better gun that the Lyman or TC is over the Traditions. I also second the recommendation of getting a .54 over a .50. Forst off, you have a little extra steam should you ever need it, and second, and probably more beneficial to most of us, you get a lighter weight rifle since most manufacturers use the same outside profile barrel for both .50 and .54, but just drill a bigger hole down the front to make a .54. If you had said this was a target rifle, I might have said go with the .50 due to them usually being a little heavier and especially more muzzle-heavy than a .54, but you said hunting, so lighter weight overall while at the same time providing slightly better performance on game makes the .54 about perfect for the vast majority of North American hunting.
Just to stir the pot a little here, have you considered a rock lock yet? You know you want one, all the cool kids have em... :stir: