Great Concept. Your primary problem is that after spawning the boats, if you leave, you cannot restart them.
Each time you get into the boat an new key is generated, which is appearing to prevent the boats from starting.
As a few ideas that would improve this plugin and make it worth the 15.00 fee I highly suggest the following:
1. Fix the ignition issue with the boats not starting after you leave them. (Keys enabled or not)
2. Provide an option to unspawn the boats.
SpawnMini is one that comes to mind, where you type /nomini to remove your mini copter.
You could implement this as /noboat or /norhib to remove your boats.
While I certainly appreciate the work done here, this is not worth 15.00 at this point. Please provide an update and correction to the issues I mentioned, along with adding the /noboat /norhib, and I am sure you could get 25.00 from this.
Thank you.