Have any of you seen the latest offers for the
Drei-Seen-Land region?
www.kulturjuwel.ch
You can rent historic buildings for 1CHF.
The buildings that are on offer are all hotels or guest houses, and you can try to "reserve" one night for max. 2 persons for 1CHF.
Sorry the page is only in French or German.
I just tried to reserve this one:

a 300 year old thermal bath, (wellness and luxury included they say).
I also tried to book this one:

A brewery from the 18th Century.
I will keep you posted if I get either of them.