DIY
I can't afford to buy the panels or the VAWTs for the heavily insulated home I'm building (probably because all of my money is sunk into the house building). But I found I could get Grade A solar cells for $200 for 100 cells. That will make a nice panel, some assembly required. And a couple of DC motors, each for about $50, some wood and some PVC pipe and I'll eventually also have a pair of VAWTs.