Firstly bareboat is pretty uncommon. Secondly what are you looking for? There was a big cabin redbay based at Craobh Haven but not sure if it is back in action after an "engine overall" recently? There was also someone in Largs offering bareboat. neither of these options will be cheap - you'd potentially be better off buying something like beamishkens boat using it for two weeks, even keeping it up there all season and selling on again for essentially the same money a few months later. Assuming of course you had the cashflow to do that! There may be a few smaller options but they are likely to come with fairly tight restrictions on usage area etc.