Chile - the float sounds a good idea, unless you quite enjoy the tinkering and monitoring involved (I do, a legacy of too many years when I ignored stuff). I think a good rule of thumb, once you understand your expenditure, is to add 15% to cover stuff that just happens and which you forget about - the odd prescription, dry cleaning, additional transport costs, every item of skin care/make-up running out at once are usually the things that catch me.
Planning ahead for Easter chores, and I have booked a heavy-duty pressure washer from our local Library of Things. £20 for two days/overnight loan. Will be recruiting DS, once he's home, to climb ladders and reach the tops of shrubs to trim them, and clear gutters. Also listing the plants I want to buy, which could get spenny indeed. That Sarah Raven catalogue is very seductive. If anyone knows of reliable and lower-price suppliers of perennials (verbena, veronicastrum, heleniums, echinacea, geums, salvias, are on the list so far), ferns and hellebores, I'd love to know about them. Also need to buy mulch.