Hey @krnel
So after I saw this post I wanted to finish a post about sleeping surface and sleeping systems as I wanted to show you you should not buy a mattress ... it took me a while as I was also off-grid but hopefully I'm not too late :).
Here's the link
Health benefits of sleeping on the ground and other nuggets
https://steemit.com/health/@joewantsfreedom/sleep-sleeping-surface-systems-and-why-your-western-bed-is-not-that-good-for-you