Link custom field to order status?

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 7.0.17

Is there a way to link the value of a custom field in the checkout to the order status?

What I need to do is, give the customer the possibility to waive the right to cancel an order within 14 days (value = yes). Then he should be able to download files directly after payment (status = confirmend). If he does NOT waive the right to cancel (value = no), the order status should be changed to pending so no download is allowed until I change the status manually after 14 days, which also means that the status would still need to be pending even so payment is received. I know that’s silly and nobody will choose the second option, but that’s German law for you.

If this is not possible, is there another way to achieve this functionality?