The problem is that if you're at an income level where you could comfortably save up for something like this, you're also likely to have much higher fixed costs (bigger house, car, etc) and more expensive habits (food, subscriptions, etc).

That said, without living particularly frugally I'm currently able to save up to a third of my monthly income. This means that without cutting costs I could spend one month jobless for each two months of saving. Truth be told there's still plenty of spending I could cut back on, although that would mean a change in lifestyle.

Time to start saving too?