If I really wanted/needed to save that amount of money and was working consistently I imagine I could do it in a relatively short period of time. I say that because often people are working 40 hours one week and are only working 20 the next. If I'm working 40 hours every week, I could have £100 saved in a week with ease. I could save £500 in a month and £1000 in two months. I wouldn't be left with much disposable income to spend on leisure etc. but if I needed to save those amounts, it's a sacrifice I'd be willing to make for a couple of months if necessary.