What a great idea your challenges are @joewantsfreedom! (By the way I want freedom too)... I had a look at your sleeping challenge albeit briefly for now (will look in more detail later on after chores) and the whole concept appeals to me. In fact the sleeping thing we already do now and then. We also take cold showers sometimes. The discomfort keeps you in a little condition to deal with adversity if it's thrown upon you. Anyway, on my last birthday my wife and I slept on the floor in front of the open fireplace in our last home. It was novel and I really enjoyed the flickering light, the crackling sounds and of course the warmth. The floor didn't bother us!