Accommodation
Here is a list of some hotels that are close to the main venue, DHUB. Barcelona has a good Metro and plenty of affordable taxis so even if you are not extremely close it should be easy to get to.
We have also arranged a partnership with airbnb, and can offer discount for people who want to list their space for people to stay in. More information here http://entrepreneurhostsentrepreneur.com/fab10-bcn/