My wife, Lori, and I built our own brewing system last summer. It builds on the system and techniques that we have learned - which was a 10G rubbermaid cooler mash tun, 7.5G kettle, and batch sparging. Previously, we were constantly lifting buckets, kettles, and mash tuns full of liquid several times during a brew session. Everyone loves a new gadget, but we also wanted our brewing to remain hands-on as much as possible while removing grunt work.
So looking to use the techniques we were used to, not wanting to buy a pump, and wanting to be able to get it out under my garage door left us with one option - build a '2.5 tier' brew system. The mash tun sits on a winch operated lift so that all liquid movement is done by gravity. I believe its the first of its kind. I've seen kettles and hot liquor tanks that raise, but not mash tuns (I didn't to an exhaustive search though).
There are many more pictures of the build and first brew here, with captions explaining how it works.https://picasaweb.google.com/Jimmy.Kroon/BrewensteinABrewingMonster