In the UK pop-up restaurants are usually run by regular people and not professionals:
http://www.timesonline.co.uk/tol/life_and_style/food_and_dri...
http://www.guardian.co.uk/lifeandstyle/2011/may/26/pop-up-re...
http://www.timesonline.co.uk/tol/life_and_style/food_and_dri...
http://www.guardian.co.uk/lifeandstyle/2011/may/26/pop-up-re...
There is a similar difference between Vacation Rentals & Hotels, but I expect both establishments to make money for a long time.