Instructables user, TheNaib, has written a tutorial on how to create a solar thermal water heater for under five dollars. It will involve a fair amount of DIY, but nothing too complicated. designed as a fun project, but with some tweaking it could
There are so many uses for shelf brackets! These are shelf brackets, repurposed to frame a window --- what a clever idea. You could do this to define and separate spaces in the same room, too. (Say an entryway and a dining room.