For those of you who are not applicable for our solidarity couches programm, we recomment to look at the following affordable hotel options:

Hotel Regina (the closest to the University Campus)
http://www.kremslehnerhotels.at/en/hotel-regina-vienna/

all the Motel One sights are within 20 Minutes away from the conference sight by tram. Underground or bus.
https://www.motel-one.com/en/hotels-destinations/our-locations-newly-opened-hotels/