Rolf... How does this sound??? Ron and wife buy tickets to your place, Ron puts on a class for a given number of students for a length of time set by Ron. Students pay of course. You supply room and board for Ron and wife, plus a personal guided tour of parts of Europe for as few days..
I'm assuming Rons married... But hey... Might work for both parties.. Who knows... You might get an affordable class and Ron an affordable trip to Europe.
Well it was a thought anyway..
Dave