My name is Niksa and I have been in the tourism and hospitality business for over 25 years.
If someone asked me what is the best advice that I can give being the host for so many years, I would say don't look at your guests as just temporary residents at your accommodation but rather as the opportunity to always meet someone new and interesting since you never know which friendship can arise from it. I think people can feel your hospitality and eagerness to help and they will always come back somewhere where they were respected rather then just perceived as transactional matter.
Throughout all these years, I connected and became close with a lot of people staying at my villa and I think the best thing about being a host is that I can call those people friends, not guests anymore.