There are a large variety of direct sale fundraising ideas, and you'll want to browse through those, because the great majority of them will work really well as extra fundraisers for your church fundraising event. And don't feel that you have to limit yourself to just one type of fundraiser, there's no reason you can't get several fundraisers going at the same time, and in fact doing this can really help your profit levels. If you have a wide range of products available for people to purchase at your church building fundraising event, then not only do you increase your chances of having something for everyone, but you also have a much greater chance of getting people to buy more than one item, which can really boost your overall church fundraising sales numbers.
Intermissions or breaks during your event are prime fundraising time, so use those to push your sales team forward into the audience and get your supplementary fundraising efforts moving. This will not only help get profits up, but it will also help members of your church become acquainted with the community they serve, and this in turn can help ensure greater amounts of donations and support in the future for any other church building fundraising you might be doing.