@Eric1304
Like the others, I am also not happy with such combinations , specially not from someone who is new to airbnb, has no reviews, no profile photo and is verified only by email and phone number.
It is in my house rules that the person who booked has to be present on check in. Sometimes I do make an exception but he booker has to send me his/hers photo ID in advance . All guests have to show me their photo IDs at check in or send it in advance.
The booker is responsible for the keys and all the damage done during their stay so be carefull who are you booking for.
Regarding people change - every one of them will need a new bedding and towels and the host will have to come to change the beds, so extra cleaning fee may apply . You should work it out with your host.
I have very bad experience with groups who didn't check-in together. There are number of things I explain when the group arrives including keys and locks, house rules, how to operate the appliances etc... and those who arrive first should explain it to the others who come later - but they never do. And then we have a problem.
My advice - book a hotel this time.