I have bought dozens of factory guns, and have had a few guns put together. I was at the crossroads you are before. And here is what I learned.

1.) If you have a plan for the gun like an upcoming moose trip, don't trust the gunsmith saying he can have it done in time. I ended up having to buy another gun, and it took the smith about 6month longer than planned and it was horrible workmanship, cause I rushed him and PO'd him.
2.) I have had great luck with rebarreled built guns and some bad. Nothing was in the middle. But one in particular sure was barreled badly. So realize there is a chance for a lemon. Gunsmith reputation and honor are important.
3.)I have some real nice factory shooters that I wouldn't sell for 30% markup.
4.) If I had it to do over, I will send the barreled action to a place like shilen. Have them rebarrel. I have noticed they do stand behind thier work. Its cheaper to find a gunsmith, but hard to find a good one.
5.) If your gunsmith is taking much longer than expected, don't rush him, either leave the gun or pick up the whole shootin match and cancel the job.