Build a LLM search tool

We are looking to add an LLM text search box to our custom website, www.eyeglasses.com. It will be trained only on our website. We anticipate around 100 queries per day, 3000/month Your proposal should include a description of which LLM provider you would use, what that provider will charge in fees on a monthly basis, and the db requirements for it. This is not a chatbot, just a Q&A tool that will stand on its own Please provide examples of similar AI LLM tools you have built.