Integration Project Manager

I have a case study where I have to write a summary of how I as a project manager look out at the scenario and my takes and working on the process of integration of acquiring and Airnbnb into Arbio(A business where they manage AIRBNB hosts). Scenario - We acquire fully operated business, this means we don't have a downtime usually to implement changes and we usually start with absorbing an existing running set up almost immediately. Keeping this in mind along with its challenges. How would you structure the integration process of an acquired vacation rental business into our portfolio? → Please write down a detailed step-by-step process including all departments (Acqui, integration, field operation, finance and brands ) and tasks that you think could be involved in this. Write a business plan case study keeping Airbnb KPIs in mind and the Timeline to measure business and also Know How?