Depends on the local economy as well.Parts of rural ireland have had dramatic losses of income , in Dublin where i work times are hard and customers are either just not getting them done or stretching out how often they get them cleaned oh and off course in recession lots and lots of window cleaners appear.My advice is canvass do leaflets gauge response, having done work in the rurals before in wicklow and kildare a consideration is the travelling distances betweeen jobs hope it works out