SIR consolidated report recommendations

A client has 15 Sage 100 companies & 9 Excel spreadsheets. Each spreadsheet has 20 tabs - one for each company plus several for combining different companies.  SIR will take about 5 minutes to load. I'm looking for a recommendation as how to structure the reporting. Do I place all 180 tabs into one SIR report, or should I create 9 individual SIR reports?

Thanks..

Lew Weiner