I personally believe you'd be better going with the Xbolt Hell's Canyon until you have the time and budget for what you want.
The Browning is a fairly light rig that plain shoots! My dad has one and I'm pretty impressed with it.
If I were installing a barrel myself, I too would go the remage route, but since a smith will be working in this, I really don't know why you wouldn't have him just use a non prefit barrel.
I was in your shoes myself. I've made decisions based on finances (still do) that cost me more down the road because I was trying to save a few dollars. I would suggest saving more money and doing it the right way and exactly how you want it vs just doing what your current budget will allow. Your 308 will work fine as an elk cartridge. Just pick the right bullet and you'll be good to go.