If you own a home or vacation property that you do not use year round, you can rent it out
using AirBnB. The main drawback is doing so invalidates your insurance of all types
including liability. It can be quite difficult to find an insurance company that
will give you the necessary extra coverage. Both hosts and guests rate each other
so you can avoid guests who have trashed other properties.
The services started as renting out air beds, hence the name.