What does a trigger job usually cost on a single six?
Depending on your location, gunsmith time is running between $75-$150/hr. The spring to cut trigger tension is cheaper than the shipping and handling. It takes about an hour to disassemble the SS, hone the trigger/sear surfaces to remove the snags, install the spring, and re-assemble.
A strong feature of Ruger firearms, is they are designed for ease of service and maintenance, and everybody and their brother supplies quality parts to upgrade. You Tube has endless, and often quite good video segments that walk you through.
Accuracy is a combination of what the gun likes, and the user interface. My 70's vintage Stainless SS will threaten the safety of a prairie dog as far out as 100yds, and has many times. Tree rats are in DS at 35yds with a Remington CB.