If you have any questions INTERPLAN will assist you.
Accommodation for free/ Tip: Couchsurfing
There is also the possibility to stay in Ulm - for free - . This might be interesting for open minded and young people.
The idea is named Couchsurfing, visit https://www.couchsurfing.org/
Couchsurfing International Inc. is a hospitality exchange and social networking website. The website provides a platform for members to "surf" on couches by staying as a guest at a host's home, host travelers, or join an event.
As of January 2012, the website claimed 3.6 million members. In March 2013, the website claimed 6 million members in 100,000 cities worldwide.
Couchsurfing International Inc refers to two separate legal entities. The first was founded in 2003 as a non-profit organization, and was liquidated in 2011. Its assets were sold to the private for-profit corporation Better World Through Travel, later renamed Couchsurfing International, Inc., which defines itself as “a mission-driven for-profit corporation”.
Infos on Youtube/ Englisch: here (This is couchsurfing)
Infos on Youtube/ Englisch: here (Couchsurfing safety - How to find the perfect host!)