Although it may not be morally ok, one could just buy a laptop for a conference etc, and then return it after a week if the store has a return policy. I've seen

Although it may not be morally ok, one could just buy a laptop for a conference etc, and then return it after a week if the store has a return policy. I've seen stores take back laptops no questions asked for up to 60 days. If you are in a pinch. If not you can just sell it (there or at home) and take the loss as a rental fee.