They could be durable and long permanent. The only requirement is regular maintenance along with inspection, cleaning and lubricating. The chains which always be the most key components should stay clean and rust for free. There are only several bearing points that require oiling separate often require dismantling the hoist. Dependent on the that should finished once within a year or two. Because they devices have gears what is important to place them sand, grit and dirt free. To fix the gears dismantling is actually required. After that may have be greased with a tacky ruthless lube.