Adjustments woocommerce site

Hi, For the website adjustments: [login to view URL] 1: The first one is that my last developer made a min. order of 20 persons at the calculator. For example [login to view URL] Now this is active in all categories but must only be active in one categorie. 2: [login to view URL] in the checkout page there is a calendar where people can select the date of delivery. Now they can select they day it self to deliver but this is not possible. The earliest time to deliver is 2 day's later. So this must be changed in the calender. So if its 11-6 people can select the date starting at 13-6. 3: Under the delivery there must be a new field with "returning" and a callender where they can choose a date to return the equipment they used. 4. There is a new categorie called BBQ: In this categorie there are products where they can select with check boxes what kind of meat they want to choose and it to the cart. This checkbox must be in the content area of the categorie. They see a selection of 25 kind of meat and can select 7 pieces. This must be delivered in max 2 days because its not that much work.