Considering t-shirts and food...I forget what show it is but it's at Gettysburg - they make a medal for the annual show that members here have purchased. Other coin clubs have made annual medals for their shows too, for example I had one from Hershey Coin Club made in 1973...I think. Depending on attendance you may be able to raise some funds for your club by having medals made and selling them. When I looked into getting challenge coins made the cost was around $280-$300 for a minimum order of 50.
Make sure you do road signs a few days before the show, and certainly the day of the show. Make it really easy for people to find the show with ARROWS pointing the way towards the show, for those people who just spontaneously want to go. This is very cheap form of advertising and helpful for people who don't know the area that well. How about some sort of "coin concierge" who can help people entering the show locate dealers selling coins most relevant to them, answering questions, and help break the ice between the collector and dealer, walk them around, etc. Also, I work for a Direct Mail company. If you, or anyone, wants some help on your mailings, address hygiene, I can try and be of assistance. PM me for more details.
You are speaking in very general terms. I broke down you post, with my responses in bold under each issue: I don't mean to imply this is a losing proposition, just that there may be better ways to fund raise for the club without stepping on somebody's toes. Keep in mind that it's the dealers you invite who generate money by paying table fees. If they feel put out because they perceive the club is undercutting their prices, they may not come back next time.
Little different scenario. He is already in competition with those other dealers. Bringing them together in one place a couple times a year probably generates more revenue by hosting than he makes in sales during those shows.
treylxapi47, You've been given some very good suggestions. Great that you're working on a Facebook page. There are other free avenues for advertising available as well, like Craig's List. Community bulletin boards, including those in grocery stores and laundromats, where you simply hang a flyer. I particularly like the road signs idea. There are vendors who can make those signs similar to election signs that litter our landscape every May and November, and do so inexpensively. You can have them printed in a generic format (no date) so you can collect them after the show and use them over and over again. I'd be willing to bet your club is not a non-profit in the IRS 503(c) sense of the term, but if you can show that all the money the club generates goes back into the club, you should be able to find local business (both coin-related and non coin-related) that may be willing to help you out, even if it's only a little bit of help. Keep looking! I do admire your dedication.
My 2 cents: If it's a club sponsored show, you have every right to host a table whether its free or you pay the club. I'm in a club in northern Minnesota. We've been a club for just over 10 years now and host a fall show every year. We send out notices to folks who have signed up for raffles in previous years, put out about 20-30 "yard signs", place flyers around town and local towns, and usually promote the show in the paper and coin publications. But......attendance has been dropping for the past 3 years. Our best years were about 300. Lately were are around 100-150. We bring in food for dealers so they are happy, but never thought of offering food to attendees, or hosting a Facebook sight. That's a good idea! I think the economy is playing the biggest part in the decline. And we are in a town of 88,000. Club attendance is also at an all time low. :-( But I'm a firm believer in coin clubs......great friendships can be had there, along with great learning!