By Graeme Murray & Chloe Cawood A farmer has spent £20,000 transforming an old combine harvester into a quirky holiday home. Will Roughton bought the Massey Ferguson 860 for £5,000 and it was previously used to harvest 20 tonnes of wheat an hour on a family farm. But he decided he could make better use of it and spent four months converting the farming machinery into a cosy BnB on his campsite. The first task was taking out all the working parts of the combine – he called Kaleb. Will, 36, of Friskney, near Skegness, Lincolnshire hollowed out the machine so he had an “empty shell” to work with….