We recommend you stay in the downtown area, which is where the SUNTAP takes place. If you are looking for a hotel you can take a look at the available options, remember to put the filter in the downtown area !!!
If you are looking for a cheaper place, we leave you a list of recommended hostels:
http://www.hostallis.com/, https://www.sevilladreamhostel.net/
If instead you prefer to stay in an apartment you will find numerous options on Airbnb.com