Add custom filter to just display properties of a specific conutry - Wordpress - Houzez Theme

Hello, we would need someone who is able to customazi our WPTheme "Houzez". The theme offers different prebuild page templates. We would need help to add an additional filter to one of the templates. We work in real estate business and like to offer properties from different countries, for this reason we need the new countrie based filter in the theme. Houzez offers different tmeplates to display the properties from the database. At the moment you can say that you would like to see all current published properties, or just properties from a specific city, or area or properties which are for "sale" or "rent". We would need you to add an addional filter, which gives us the oppertunity to filter the property also based on the country. According to the support all files you would need to work on are located in the following destination of the theme: (for the templates) wp-content/themes/houzez/template-parts/ wp-content/themes/houzez/template/ (for the metaboxes in the backend) wp-content/themes/houzez/framework/metaboxes the countries are hardcoded in this file houzez/framework/functions/[login to view URL] ----------------------- It should look the same like the other filters (see attached image) We would like to have the filter in all property listing templates. It shouldn't be a big job.