Running a convention is a pretty hardcore task which is usually why established third party companies run them. Every single thing you need is in the thousands of dollars. A venue costs 5K+ easy, depending on amount of days, how long, and what services you need from them. I’d go with at least 10K. Actors themselves cost $5-15K if you can even schedule them. You’re obviously going to want sponsors and run this by legally with ABC if you’re going to use any copyrighted materials for advertising. And of course, there is advertising which costs a bit.
While wanting to put on a fan convention is quite an admirable thing, just want to let you know it is seriously no easy task and is quite a risk monetarily.
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