Hi Ryan,

It is possible to set wholesale prices based on brands using B2BKing's dynamic rules functionality.

While the default rule conditions are based on products, categories, and tags, you can also set up rules using custom taxonomies like brands. 

To do that, add this code snippet to your site:

add_filter('b2bking_dynamic_rules_taxonomy_option', function($val){
    return 'product_brand';
}, 10, 1);
add_filter('b2bking_custom_taxonomy_backend_name', function($name){
    return 'Brand Name';
}, 10, 1);

You should then be able to see brands available in dynamic rule configuration:

I didn't fully understand, are you using a different brands plugin, other than the Woo brands functionality? That should work as well, but you would need to change 'product_brand' in the above code, with the slug of your taxonomy. It may be simply 'brand', or something else like 'wp_brand', etc.

Kind regards,

Stefan