Re: Getting customized training on your own boat?
I do not know about Maine, as I am in Florida. However, during the ASA class I took here, I asked the instructor if the more advanced courses could be done aboard my boat. He told me yes.
I am sure it is more expensive to have a one-on-one with the instructor versus being among four or five on a school boat. But inquire at the local ASA school (or other reputable school). They can tell you the school policy.