After extensive research I had found Eichenweg 4 in Tuebingen, the largest apartment at the lowest price I could find. Frau Helten was extremely friendly and helpful when explaining how to use the amenities. The apartment is also on a bus line and there is plenty of street parking. Laundry is in the basement (don't even bother TRYING to find a waschsalon downtown, it was difficult) and the apartment was perfect for 4 adults and one child. I believe they also had a crib available. The apartment is within walking distance to a grocery store and bakery.
Berliner Ring is a great place just outside of downtown. It usually only took 10 minutes to drive to downtown Tuebingen, or 20 minutes or less on the bus. Around the ring are all types of stores such as a drug store (like a small cvs), organic market, regular markets, butcher, bakery and I think there are a few restaurants/cafes.
The only only only thing that the apartment needs is wifi, but overall I highly recommend... más