I have the best quote from Samskip, although a year ahead they have said they will try and honour the prices of £1450 return from HULL. I would factor in 10% .
All shipping companies ask you to add insurance, typically costs 1%, to be honest I have always missed this. Just how many Samskip (or Eimskip) container ships go down?
Factor in the sailing schedule, especially return as it is a week’s journey. You car goes for a cruise round Iceland!
Then fly cheap, like EsyJet. Pack all your clothes etc in the vehicle. Use it for an extended holiday.
Pack packaged, canned food do not ship raw meat, alcohol or tobacco.
Tourist cars normally clear customs quickly.