Filter result of Custom Post Type using meta_query with ACF

For meta_query with ACF and ordering price by ASC or DESC try following code.

$args = array(
  'post_type' => 'property',
  'posts_per_page' => -1,
  'meta_key' => 'price',
  'orderby' => 'meta_value_num',
  'order' => $_GET['orderby'],
  'meta_query' => array(
      'relation' => 'AND',
      array(
        'key'   => 'contract',
        'value' => $_GET['contract'],
      ),
      array(
        'key'   => 'rooms',
        'value' => $_GET['rooms'],
      ),
      ...
   ),
);
$query = new WP_Query($args);
if($query->have_posts()) : 
   while($query->have_posts()) : $query->the_post();
      // your code 
   endwhile;
endif;