The boats are typically priced fully equipped, delivered to the charter base and ready for charter so there are no more out-of-pocket or surprise expenses for the buyer after the initial deposit. The program is structured so that after that deposit, the charter company pays for all the expenses including, insurance, dockage, maintenance and general operating expenses. The owner pays literally ZERO for the entire duration of the program. The guaranteed payment, which is made monthly, typically amounts to more or less 9% annually of the boat initial value. It is enough to cover a typical mortgage payment, making the entire proposition cash-neutral for the duration of the program. The term varies from 54 to 66 months, so the longer the term, the more guaranteed income you will receive as a whole.
This is an important consideration when shopping companies or comparing programs. While the boat is in service, the owners will have exchange privileges allowing them to sail on a similar boat at any of the companies bases worldwide. While there is no charge for the actual charter, be aware that there are fees that will need to be paid, such as cleaning or turn around costs, diesel, water and ice etc, aka Turnaround fees. So familiarize yourself with the exact fee structure with various companies.