In response to the $580 quote we got on a boat mattress we decided to make our own. It turned out Awesome!! We even had enough left over to make a little bed for Ginny's cat Snazz.
We also decided we needed an "anchor buddy", so we tore up some old batteries to get free lead (and yes, we were quite aware of all the many levels in which this was a terrible idea) and then broke down and bought some lead after two batteries only yielded 10 lbs worth.
We painted Thurston's name on the boat :(
... and had a tiny bit of extra time to hang out... But only while working!