English for room exchange

Hi, im a british girl. I lived in Madrid for 6 months as an English teacher and want to return to the beautiful city. Im currectnyl in Barcelona but will return in september for 2 weeks. I would offer english classes and conversation for a bed in Madrid. It would be a full imersion of English for 2 weeks as i would live with you just in exchange for a bed and food if you can. I speak Spanish so i can help with mistakes