According to the link below, each Congressional office gets between $1 and 2 million for their office budget. If we average that at $1.5 million, then that’s about 435*1.5 = $652 million that goes to House office budgets (not including salaries for the Reps themselves). Let’s say we increased the House tenfold, to about 4000 members – with the same budget for staff – $652 million / 4000 = $163K per office. That’s enough for, say, two mid-income (~$60K) staffers plus travel expenses, perhaps.