i read your post. I admire anyone who trys to do something with with their life. It takes a lot of courage to start afresh in a new country or even in a different field of work. I am an electrician by trade but can also carry out plumbing,carpentry,tiling, suspended ceilings etc and have often thought about starting a business in corfu. I have two young daughters so am concerned about their schooling.
I purchased an apartment in Barbati in 2000, so have good experiance of Builders and tradesmen. Good service is not a high priority Although they try to make up for it by being friendly!! Dont mention reliability!! These are a few areas where you could get a good reputation. There is a gap in the Boat hiring market which could be exploited, although some market research would have to be carried out.
I have some American friends, and the thing they constantly moan about is the expense and lack of service, now we have the Euro in Greece prices seem to have risen considerably.
Maybe oneday i will realise my dream(im'e halfway there)
Until then keep the faith and i hope which ever way your path leads it works out OK, Who knows maybe one day i will be renting one of your boats!!!
all the best Mark