Imagine signing a simple ceiling renovation quote only to face endless surprise charges later. This guide unpacks the dangerous 'one lump sum' trap, breaks down 5 key jargon terms, and teaches you how to spot transparent, trustworthy contractor quotes. Imagine signing a simple ceiling renovation quote only to face endless surprise charges later. This guide unpacks the dangerous 'one lump sum' trap, breaks down 5 key jargon terms, and teaches you how to spot transparent, trustworthy contractor quotes. Imagine signing a simple ceiling renovation quote only to face endless surprise charges later. This guide unpacks the dangerous 'one lump sum' trap, breaks down 5 key jargon terms, and teaches you how to spot transparent, trustworthy contractor quotes. Imagine signing a