if we use the preferred caterer we get 1000.00 off the facility but then the preferred cater charges 90.00pp. there are a list of 10 we can choose from but they are the only one giving 1000.00 off.should we go with a cheaper caterer one of which will give us a 1000.00 off the total.we have only check with two caterer havent checked out the others yet.