Stewards get paid minimum wage, so for a 10 hour day it would be less than £100 per steward.
So 20 on duty (which would be excessive), would only cost £2,000.
With other staff like camera operators, food sales, etc, I can't see why it costs more than £5,000 maximum.
Groundstaff would already be paid, (spectators or no spectators), and it just seems that because members have already coughed up. the club is being lazy, and doing the minimum required.
At least 600 could be admitted and still be in a safe environment.