Cheap ElasticSearch cluster

Hey guys

I was researching in the past couple of days what is the best architecture and the most cost-effective architecture for deploying an ElasticSearch cluster.
Cluster information:

• 1-2 TB of data.
• More frequent writes than reads

Current Ideas:

1. One of the cheapest ways was to buy 2-4 SSD VPS servers which would cost 60$.
2. One way is to deploy EKS cluster on AWS with multiple storage claims but this is more costly in my opinion (aws charges on inserts/reads + storage + EKS per hour)

I need more opinions on this and proper guidance what are the most usual pain points with ElasticSearch. How much data is prescribed per ElasticSearch instance etc...