Hardest part is always figuring out your company’s knowledge management has been dogsh!t for years so now you need to either throw most of it away or stick to the authoritative stuff somehow.
Elastic plus an agent with MCP may have worked as a prototype very quickly here, but hosting costs for 500GB worth of indexes sounds too expensive for this person’s use case if $185 is a lot.
If you pick Elasticsearch, useful as it is, you now have more than two problems. You have Elastic the company; Elasticsearch the tool; and also the clay-footed colossus, Java, to contend with.