Swap of Synology housing for cloud and mail service

I use a DS224+ (2x Samsung 8Tb SSDs) as a cloud for my PCs 24/7. Mailserver Plus collects my emails from different accounts. My main email account is hosted by IONOS and I also use it to send and receive emails. I have installed a Letsencrypt certificate for my mail domain.

I have a second empty housing DS224+ and would like to install it in my van for longer tours. How can I temporarily switch the task as cloud and mail server between the two DS224+? I would like to avoid high cell phone costs when traveling abroad.

My question: can I simply swap both (or one) SSD back and forth? Or how should I proceed?