On a renovation job in Spokane, Washington, the most used tool was not a drill or saw. It was a moisture meter.
Before any flooring went down, walls were checked. Subfloors were tested. No guessing. No assumptions. Moisture problems that would have shown up months later were caught in minutes.
Most people buy tools that help them build. Fewer buy tools that help them verify. A moisture meter, voltage tester, or stud finder does not look impressive, but it prevents costly mistakes.
Good renovation tools do not make noise. They make certainty.