Looking for a furnished apartment for three months temporary stay (May 01 to July) in Konstanz or Singen area

I and my wife are planning to visit University of Konstanz this summer from May 01 to July 31, 2023 (3 months) for a research project. In this regard, we are looking for a fully furnished two/three room apartment (one living room, one bed room with Bed, a fitted kitchen with basic utensils and bath room) during the period of our stay. A larger 1.5 room is also fine.
We require the apartment for short term (three months) from May 1 to July 31, 2023. If you are interested in renting or subleasing the apartment, please contact me.
I am a professor in India and I have come to Germany few times earlier as an Alexander von Humboldt fellow (2003 to 2005, 2016 and 2019). Last time when I visited Germany in 2019, I stayed in Singen and took train to reach University of Konstanz.
Location can be Konstanz or Singen as long as I can reach the university by Bus or Train.
We are a respectable family and we will take care of the apartment to the best of our abilities.

Eagerly looking forward for your reply.