A bed isn't a bed isn't a bed, anymore. Take a look at some alternatives to grandma and grandpa's mattress and box springs combo. As long as you get a good night's sleep, who's to say a teepee bed isn't good for your back?
This may be hazardous to your productivity.
All you have to do is prime the pump of your own creative juices to come up with a new bed design and make sure you can sleep on it. As you see, these all tend to be hanging hammock styles.
For colder nights, set up a bed shelf next to the fireplace for the cozy, cabin feeling.