Beyond the basic kit lives the hardware that makes maintenance pleasant: one-piece coated rods that protect rifling, quality bronze brushes and jags, carbon-scraping picks, chamber brushes and padded bench mats that keep small parts found.
Cheap sectioned rods scratch bores - the one-piece upgrade costs little and pays forever. Building a proper bench? Start with a mat, a rod and good light; add specialty tools as the collection demands them.