@Andy144 I have a suggestion for you- work a bit on your listing descriptions. They are very brief, there is no information on Interaction with Guests at all on the beach house, and the apartment only states that you're available if needed but you prefer to give guests their own space. This kind of wording, or lack of wording, gives potential guests the impression that they are not being watched, that there is no one around,. and can encourage partiers to book.
Try to make your listing description a bit more personal, getting across the message that these are personal homes, not faceless rentals, mention yourself and your spouse, mention that you live close by (maybe you live upstairs of the apartment rental?), things to make it clear that you could possibly drive by or that you can hear and see what's going on, without saying that directly.
Also your ad doesn't market towards any specific type of guest- try to do that. For instance, you could say it's a perfect place for a family beach vacation, or a romantic weekend away kind of thing.