I remember you the simple steps to create a boat rental offer:
1. Register you account as boat owner on Airynb site.
2. Register your boats on Airynb site
3. Insert a boat rental offer for every boat with calendar and price.
Boat renter communicate with you through "send message" button in the rental offer filling in the Airynb contact form. Remenber that you deal directly with the future boat renter.
You will pay a token for every day that your rental offer will be present in Airynb site. The value of the token depends from the number of your boat's feet.
When the boat renter will accept your boat rental offer you will delete the rental offer for that period on Airynb site. From that moment you will not pay more.
Airynb will notify you well in advance when the token payment will be active. From now until then you will pay nothing to enter your boat rental offers. Read more about How create a boat rental offer? How much I pay to insert a boat rental offer on Airynb site?