1. Excel expert with extensive vba programming experience. I can help you pull your data from XML into the format you need to view in excel.
2. I have worked for several years in excel and perform daily work using vba, user forms, pivot tables, formulas, etc.
3. I would start by committing to 1 day but this depends on the scope and could change
4. I have an extensive background in Excel. I would love to know more about your project.