Found this rather odd, needed to create a wordpress site today and decided to spin up a droplet on DigitalOcean.
See: http://imgur.com/qOmfMh5
The Ubuntu 14.04 image with Wordpress requires 30GB space, which seems rather odd to me. Any idea why DigitalOcean is doing this?
That said, I host three wordpress websites off a 512MB droplet with 20GB storage. Just fire up a barebones 512MB droplet and install wordpress yourself. Be prepared to play with a lot of settings and configurations to not run out of memory all the time.