Interestingly, if it's sail powered it looks like people would actually pay to travel on it (although maybe not to travel from where you'd also want to ship car

Interestingly, if it's sail powered it looks like people would actually pay to travel on it (although maybe not to travel from where you'd also want to ship cargo?). So maybe workforce would not be that expensive on those ships. For instance: - the sailcargo project (https://www.sailcargo.inc/ https://www.sailcargo.inc/) main ship has as many guest travellers than sailors (assuming "guests" means paying customers) - the ecoclipper500 project (https://ecoclipper.org/prototype/ https://ecoclipper.org/prototype/) also has room for "guests" - many of the traditional large sailboats are packed with paying guests and unpaid trainees as well