Word of caution. As you may know these are Chinese sort of copies of Japanese industrial engines but have nothing in common so spares could be an issue over the 35 year life of the engine.
In the UK the small sizes are very little cheaper than the well established brands such as Beta and Nanni (Kubota based), but they become much cheaper relatively once you get over 40hp so they attract some commercial users who do high hours in short periods and are very cost conscious. However they have made little inroads into the yacht market.