Leveller - I strongly recommend an old rear wheel drive Volvo. Many do over 300,000 miles without major work. They are great comfortable tugs and what you spend on their not inconsiderable thirst you save on the bits that don't break. For the time being many parts available from scrap yards too. You can get a good one for under £1,000 - indeed under £500. Because they are so safe they are quite cheap to insure too.