For sure, conventions are so dang expensive! We had to take a huge gamble and almost bottom out our bank account to do Emerald City Comicon in Seattle but thankfully made the expenses back with some profit. You should totally do a convention sometime! The smaller ones are a lot cheaper for exhibitors as far as the table cost is concerned which is what I did for the last few years in Kansas City at an art show called Spectrum Art Live. You got this!