A shout out to Flux for letting me share this, but I wanted to expand on it. Check out the review on Proof of Useful work and its implications. This post will change so remember to check back in as I discover more.
Well the simple answer is, their are lots of options. If you have a pc that you don't need anymore and meets the specs that would be the easiest way to start. I now have 5 nodes hosted at home and you can possibly add up to 8 with uPnP setup on your router.