talent Joomla expert

i need to modify a joomla module, the request is the following: I have this template [login to view URL] When you search in the main page the search results are shown with the default layout of joomla wich gives the 2 requests. My idea is to have a module with the same style as the template one but to have the sapce to search by key word and use the dropdown "search and filter" to have a list of the locations (image attached), the location dropdown must have its own search as they can be lots of locations , this module must be able to search in the custom fields of the articles thats where the locations are, the smart search of joomla can search custom fields so this can be used as a base, this module must be available too to use it in other parts of the site in module position. For the search results this must be shown as in the listings of the template ( https://ja-cityguide.demo.joomlart.com/index.php/en/listings#sort=position&sortdir=desc ) with the filter at the side menu. All must be mobile friendly.