Seeking Advice on Web3 Project Architecture

Hi everyone, I'm looking to develop a mid-size project (20k visitors per month) and I'm trying to figure out the best architecture for this. I was thinking about using Vercel for the frontend, Cloud Run with Redis for caching requests of contract state and eligibility for the frontend API. Additionally, I'm looking at an always-on Kubernetes server to listen to blockchain events and store them in Redis. I would use Infura as a WebSocket for the blockchain listener and contract state API. However, running GCP services at this scale might be costly. I would appreciate some advice from experienced developers in this field on the best architecture and cost expectations. Thanks in advance for your help and advice!