This mattress hunt is like a rabbit hole. Hammock isn't going to work for us. Its cold here, and we don't have the inside space. Plus, it doesn't do well by our backs long term.
I've found a pretty local handmade mattress company that just opened its doors in December, and I'd love to support him, but I just don't feel like I have the $$ to do so. http://www.fizifuton.com/ But I'd really like to, because I like what they do and that they're close to me (4 hours) and small, etc. I'm seriously considering this option.
Also an option is to just contact his suppliers, which he lists on the site, and go directly to them to get the wool & cotton batting that he uses and try making our own, round 2. But that feels a little mean.
I just researched the blue jean insulation route, and the company actually sells mattresses! But they are treated for fire retardancy, but they say its non toxic, just not what it is... I've heard borax will do the trick. But they say they're mainly used for institutional bedding (per the website) so I'm guessing they're not that comfy. Plus I have this thing about supporting small companies over big ones, which puts me back to the local guy.
This is such a pickle.