Can’t give you any feedback with the ridiculously limited info you gave us. What boat, size, age... what size units... 9k BTUs, 16k... or bigger...
Every high end modern car is complex and expensive to maintain... the key once a car is out warranty is to find the right independent specialist...
Only 30k miles. Yeah apparently the high pressure fuel pump and injectors can be a problem and not cheap. The turbos too if abused which this one...
Maybe getting a 2008 335i convertible (metal folding roof). Never had a BMW before, wouldn’t have gone looking for one but you don’t look a gift...
It’s only a few hours. I ve ordered parts from The UK (sliding doors). Easy.
Have you tried contacting sunseeker? They should have the info.