Appwrite on Raspberry Pi: Help & Suggestions needed!

Hello Community! First of all, let me thank Team Appwrite for building such an awesome BaaS! Secondly, I am creating a product with Self-Hosted Appwrite. This is a corporate offering, and my startup cannot afford a full-scale x64 based server/pay monthly to cloud providers. Hence, my choice is to use a Raspberry Pi for hosting the backend and website. But I don't know which Raspberry Pi will be good enough for my use case. My use case expects:

~ 100k Monthly Active Users ~ 1k Requests an Hour, expect it to not go above 10k Requests/hour ~ 500 GB of Storage at Max

With the above in mind, which ram model for the Raspberry Pi 4 Model B would you recommend at the minimum, and which one would you recommend without considering the cost aspect, from the following: 4/2/1 GB RAM

Thank you so much for your Help! 🙏🏻