F1 Project Help

I'm doing some data analysis about F1 for my statistics class project and would like to have team budgets as a variable, but the data is nearly impossible to find. I found out about the Formula Money report, but sadly don't have thousands of dollars sitting around to spend on collecting this data. If any of you are big F1 buffs and happen to know where I can find some fairly accurate annual budget data for different years, please let me know in the comments below.