More because I'm disorganised than for economic reasons. No food in the house. Usually I can cobble something together but there really isn't much. Did this sound like "soup" you would eat?!
Takeaway is still an option.
Large baking potato, couple sweet potatoes, couple carrots. Peel, chop, cook in a little oil, then boil with a couple of stock cubes, blend. Some double cream I could add.