The host is very inconsiderate and only think for himself. Even though you have to cancel for good reason right after booking, the host would still want your money! I had to communicate so many times with him and the Airbnb agent without any luck getting the refund back! I'd not book any of his rooms nor would I recommend such a host without ethics.
Beware and rethink it before you book it! There are a lot of other places that you can cancel and get the full refund. Don't do it here.