Three arrangements and what each costs
Contractor-supplied plant is the simplest. The provider brings the machine, maintains it and replaces it when it fails, and the cost is inside the price. It suits sites without existing equipment and removes the maintenance question entirely, though the rate reflects the capital and servicing being carried by someone else across a fleet. It also removes any argument about whose fault a breakdown was during a periodic programme.
Client-owned plant operated by the contractor is common where a site already has a scrubber. It usually reduces the routine price but transfers the maintenance risk back to the site. Hire for periodic programmes is the third option, useful where machine work is occasional. Whichever applies, the scope needs to say so plainly, because each has different consequences when something goes wrong. Choosing deliberately at scope stage is far easier than unpicking the arrangement after a machine fails.
