This topic and numerous related business topics should be easier to pinpoint. I love hosting and have been rated a Super Host since my initial eligibility (3months). Part of the SuperHost framework has to be a capacity to delight guests and to maintain a heavily booked calendar. All of this costs money behind the scenes. To remain a host in this competitive climate, we must pay attention to our Cost Factors and to understand how to track expenses in a fashion that will not trigger audit flags but will reasonably capture investments.
I have not found any real technical or narrative assistance on this topic.