I'm looking to move up to a cruiser in the 30 ft range with twins. I currently have a 24 ft with an I/O that I can pretty much service myself. I would really like to go to inboards in the 30 footer, but I am hesitant as I know very little about them. How do inboards compare, cost wise? Are they high maintenance? Are repairs more expensive than on an I/O? Enlighten me please.