Eleanor, our office both writes and reviews budgets.  Our level of involvement
is up to the PI.  Some insist on doing everything themselves; in those cases we
just check for proper FB and indirect cost rates, make sure faculty/staff time
is handled properly, maybe spot check arithmetic.  But some faculty and staff
absolutely detest putting budgets together and know that we can do it in an
hour or two, so they ask us to do it.  I'll sit with them in front of the
spreadsheet and we make it up together, works well.

Regards, Bill Campbell
Director, Grants & Research
University of Wisconsin-River Falls