Would you compensate them either with time or money for it? I think think if you know it'll take 'employees' that are contractors a certain amount of time and expenses each month then offering something small in exchange for (covering accounting fees etc) is a great way to go about it.

What “whole process” do you mean? They’ll send you an invoice they’ve generated. If their setup is good it probably takes < 5 minutes to generate and send.

What you do with it afterwards in terms of recording expenses, organising payment etc is your responsibility.