Direct booking website primary search & availability for 30-night minimum stays

1) Because my rentals are all minimum 30-night stays, whenever someone tries searching on the main homepage for anything less than 30 nights, it shows there there are no results and no homes. However, if they click on one of the homes and search for less than 30 nights just for that one listing, then it says, "Minimum Stay is 30 Nights". How do I get this same message to show up so that visitors on my site don't think I don't have any homes available during the month if their search is less than 30 nights? (I've attached several images to show you -- look for #1 in top left corner for related images).

2) When the calendar is open and a guest can click dates, if there's a block or existing booking, it says, "Host Unavailable". Can I change this message please because this is misleading; I'd like it to simply say, "Unavailable", not that the host is unavailable. (See attached image with #2 in top left corner)