It would be very expensive to order food from a restaurant every day, I ate that way for about half a year. 75 francs for dinner every day, if your salary is high you can afford it, if it's average I doubt it. It is better to go to this service for the delivery of author's dishes https://allcook.ch/menu/ here is their menu. All meals are delicious, and you can get the main course for 15.8 francs with delivery. But it's easier to order all the dishes for a month at once, it's cheaper and more convenient, plus they bring them at a convenient time for you.