I carry enough tools and supplies to repair most broken parts in a single visit. Minor repairs are included in the price of a standard tuning ($85). A more complicated repair can be repaired for a reasonable price. My labor rate is $30/hour plus materials.
Adjustments aimed at increasing the efficiency of the mechanical part of your piano are called action regulation. Frequently, relatively inexpensive adjustments can make an enormous difference in the sensitivity of touch, allowing you to play much more expressively. These adjustments restore the correct tolerances that were set when your piano was new, but which gradually changed over the years with use. There are over a dozen adjustments per note. My job is to recommend which of these will make the greatest improvement with the least expense.