I'm using the cloud version of odoo. What's the easiest/best way to customize the pdf footer for: quotations, order confirmations, invoices and purchase orders? 

We have 3 different bank accounts (EUR, CHF, USD) which we need to squeeze in the footer, 2 adresses (head office and production facility) as well as additional information. I would also like to put a few symbols and maybe a QR code, but images are not necessary. What's the best option for me here? Any way to avoid using odoo Studio as it would double my monthly cost?