House design idea
 

for next years series i suggest they do an IKEA themed house, have nothing in there except walls, toilets etc. and give them boxes of flat pack IKEA furniture etc. - only the basics, and then each day throughout the series they could do tasks/ work for more stuff, or even have an entertainment rating on th website for viewers to vote after each episode, so the more entertaining they are, the better and more luxurious the house would become. only trouble would be finding housemates with the brain power to be able to construct the furniture...