If you literally want $1400 you don't need to invent anything. $1400 over a month is $350 a week, or $175 a day for Saturday or Sunday. Could you generate $20

If you literally want $1400 you don't need to invent anything. $1400 over a month is $350 a week, or $175 a day for Saturday or Sunday. Could you generate $200 a day for two days a week? Almost certainly. Anything from cleaning windows, to shovelling snow, or digging gardens. If you've extra skills and experience it should be even easier - child-care, for example, or dog-walking. Hacker News is obsessed with side-businesses and "passive income", which is often anything but passive. If you're actually just wanting a comparatively small amount of money then there are much easier ways to get it than starting a business. (Of course if you do explicitly want to start a business, which your post doesn't really seem to suggest, then good luck to you.)