@Giulia297 You are obviously doing a great job with both of your listings, given the high ratings and positive reviews. So now that you have the quality nailed it seems you are seeking quantity, right?
I don't have the types of listings that you have, but I can offer a few thoughts. Who is attracted to your tiny house listing? Can you describe the type of guest or guests that would seek your place over a more conventional home? One of your reviews mentioned HGTV. I am a fan of the tiny house movement enjoy all the different shows. I am probably not a candidate for staying in such a home however, mostly due to climbing a ladder to go to bed...balance issues 😞
If your guests seek the unique experience of the tiny house, perhaps your description can be a bit more celebratory of that experience. You emphasize the convenient location, but that is not unique, right? What draws you to the tiny house? If you watch any of the shows about living tiny, what is being said about the experience? So maybe you start your description with something like, " Have you ever watched the HGTV shows about tiny homes? Wonder what it feels to stay in one? Come feel the coziness of the tiny home and the convenience of staying just a few blocks from a vibrant city life."
Because your competition would include all the expected private apartments or cottages, which would provide the expected, you are looking for a guest who is interested in the unexpected. You might consider social media sites appealing to that type of visitor who probably is a young person who is open to the new.
I hope these thoughts, while not very specific advice, might suggest a way to look at the issue of marketing. Good luck!!