The Eos is a great car for towing I use mine to occasionally tow a boatI've looked at this area. My EOS won't be delivered for a few weeks yet but go to here http://stores.channeladvisor.com/towbar/Store/Tab.aspx?tabid=5&FN=, find your local dealer and give him a ring. I was quoted about £400 for a detachable towbar, fitting and the lower bumper section. Also, small trailers can vary a lot in price. I have a Caddy http://www.trailers.co.uk which seems to be good value for money.
and sometimes a trailer
But hey, not at the same time!