What do you expect when you start up your own business? You may expect it to be a stressful hard slog, require blood, sweat and tears and then some, and maybe (if you’re realistic) you anticipate that your new venture might not generate a profit during the first 18 months (unless you’re blessed with a bit of leprechaun luck). But you might also imagine your start-up to be rewarding, something your passionate about, enjoy and…