Congratulations, you've identified a market need. If someone builds a tool to do all this (if the market isn't saturated with them already), companies will pay

Congratulations, you've identified a market need. If someone builds a tool to do all this (if the market isn't saturated with them already), companies will pay for it. There's plenty of tools to convert to/from Microsoft Active Directory deployments or varying quality, I don't see why Google should be any different.