Lived and worked in Tenerife and they are very big on cleaning over there; windows, paths, walls .... if it aint moving they'll have you clean it on a daily basis. In the resort where i lived (and the area around it) they even washed their footpaths twice a day unlike the never ever in the location i'm in now.
I'd say if you went over to start a business there you'd have no end of business. Loads of apartments, villas, hotels, shops, and entire resorts to canvass. Like has already been said - Go for a holiday and see for yourself. They are a friendly lot and its easy to get good contacts.
JP.