How to efficiently assist decisions while remaining compliant to guidelines, laws and regulations

I want to help a friend that'll start a business with a local LLM. He will need to do things like establish budgeting, come up with business plans, manage funds etc. This means he'll need to make different excels/powerpoints/docs etc by using an LLM. How can I restructure the relevant laws into a valid JSON for it to be used for the RAG? How can I have efficient tool calling for editing onlyoffice documents? The server is on Linux. I already have a L40s and a H200 that I can use for this.