Should we quit the rat race and travel?

Every week a Guardian Money reader submits a question, and it's up to you to help him or her out – a selection of the best answers will appear in next Saturday's paper. This week's question: We're a frustrated couple in our early forties who want to quit our boring jobs, rent out the house, and hit the road. Our one child (eight) is up for a year out, and the far east and Oz appeal. We will work a bit, but it will wipe out our savings. Are we being irresponsible, or do we go for it? What are your thoughts?