when i was 'homeless' ( in a sense ), i know of a place which there is no one there.... its a railroad track, and its well hidden... and there was a tent there.
needless to say, when i was 'homeless', i was sleeping outside in the tent, and it was one of the best nights i had... in summer, you can hear the crickets sings. its really peacefull to sleep outdoors, contrary to popular opinion.
Sometimes there is nothing more satisfying than sleeping on the bare ground. At times it can even help to realign the spine. And not once when sleeping on the bare ground has a cat come along and pushed me off.
No, sometime I'll sleep on the cold tiles of the kitchen floor when I have the flu and feel like I'm burning up. But that's because I'll walk out there to rummage in the medicine cabinet and feel too crappy to crawl back to my room so I just curl up on the nice cool floor and wait for the medicine to kick in.