I ran into a problem about seven years ago getting trigger work done by a good gunsmith. The good gunsmith up here is 70 miles away. So, I had to make a 140 mile round trip to drop off the rifle, then months later make the same 140 mile round trip to pick it up. Yep, not weeks later, but months later. The guy is good, and with being good, lots of people take work to him. He prioritizes his work, and I fall into his queue just like everyone else.
So, I decided to start doing my own trigger jobs. I bought the AGI Armorers Trigger Course and studied it, then got at triggers for my own personal rifles.
My point here is, if you decide to have a good gunsmith do your trigger, it may take some time before you get your rifle back. If you buy a Timney, you can drop it in a few minutes and be off to the range shooting the rifle without any wait.
Martyn