Run a search campaign in Google Ads with keywords such as "yacht for sale", [yacht for sale], targeting the regions / countries you intend to. Ensure that the landing page has content(s) about yachts (infact only about yachts), because Google Ads algorithms are sensitive. One cannot for example have a Google Ads campaign pertaining to furniture and then the landing page is about firniture and crypto, in such cases (nowadays) the Google Ads account will get suspended.