@Joamin0 you must get a permission to sub-let, imagine if it was your apartment and someone was sub letting it without informing you.I am sure you would be upset, plus it is illegal. Also you need to inform yourself on the laws in your country about short-term rentals. Everything has to be legal if you don't want problems, it is not worth it. That said, inevitably you will have some bad guest who will cause some problems and you need to be prepared. Hosting is a lot of work but it can be amazing, you meet a lit of new people and of course the added income is a plus. Good luck!