A life at sea isn’t for everyone, but some passengers hop on a cruise and make it their home — from anywhere from a few months at a time to buying a permanent residence. Long-term cruising is particularly popular among budget-savvy retirees. Many compare it to the cost of living in a retirement home and find it more economical. Aside from the obvious fact that one of these options is at sea, the two have notable similarities such as meals, organized activities, and room cleaning. Some cruisers jump from one ship to another, and others stay on the same ship constantly. For an upscale option, The World is the world’s largest private residential ship, with 165 permanent residences onboard.