QBO and Xero Fake Company Data & Migration (READ DESCRIPTION)

PLEASE READ THE FULL DESCRIPTION AND NOT JUST GIVE A BASIC RESPONSE. I am launching a small business finance SaaS product. I need to create VERY ROBUST fake companies in both Xero and QBO sandbox environments (I think). Although my research suggests the sandbox environment won't create a login so we may just need to work in a real QBO account. Data needed: 2025 and 2026 full year (so we aren't adding later) Full company Invoice Bills Assets Liabilities INventory owner draws/contributiopns I have NEVER done this before but assume this is possible an may be quite easy with data that already exists from other companies. Just anonymize, etc. I put $100 for the budget but have NO IDEA what this will cost so I'm open.