Woocommerce customization

We're looking for a freelancer with documented Woocommerce and PHP skills to do various customization jobs now and in future: Right now we have following more or less urgent tasks, priority from top to bottom: Website: [login to view URL] 1. Function for fixed quantities on product page after update to WC 3.3.3/3.3.4 no longer works in cart, chosen values are reset to minimum standard value. Example: $args['min_value'] = 10; If value 20 are chosen, value will still be 10 in cart quantity field [login to view URL] 2. We want invoice payment to apply only to account customers of our choice. The potential account customers should apply for a login via form on web site. If accepted, we should be able to click "accepted" and first after that invoice payment should be active for this customer. The invoice plugin is already installed. 3. We have a problem with TM Extra product options: If parameters from the plugin are changed, final total is correct, but if quantity is changed, the price will be much too high. [login to view URL] 4. Form on checkout page should be corrected, so that city and telephone field is one line higher 5. The text 'Miniaturebilleder in top of cart, should be changed to 'Foto'