Check the cost of a cleaning company and if you can afford it do it and send the bill to the airbnb support team . I believe extension is not part of the company policy ! I also believe hosting is not a business . As an Arabic woman we always host people for free actually it's a shame to take money but since in Europe this cost a lot and it's hard for a person to be rich without so many regulations from the gov it seems normal to me to get paid for a previous guests requested . So I consider myself doing a community service not business , I just get paid for materials because the honesty of managing people's stay is hug value not estimated by any number of money .
I advise you not to take more than two people , groups like four main can get a cheap hotels to mess with not a community service value.