If you pre-register, you should be able to get a 4 day pass for $45. Parking is $5/day at the convention center, unless you can find street parking. Street parking was kinda thin last year due to all the construction. There are plenty of places to eat down there (Wendy's, McDonald's, Subway, etc.) so food expenses shouldn't be to much. There are also nice places to eat in the Gas Lamp district if you want to go out to a nice dinner. And of course, the Old Spaghetti Factory is down there too. There is also a Ralph's that you can go to to get things like bottled water and granola bars (essential at any convention). Depending on what you collect, you may want to save up a few hundred for figures and such. Most of the figures are unfortunately overpriced (scalpers), but some good deals can be had. There is also artwork for sale and obviously comics. This is the largest comic book/sci-fi convention on the west coast, so you can usually find pretty much anything, from art to props. There's also a mall in the area (Horton Plaza) with a food court and plenty of stores to shop. I think I've covered anything. If I've missed something, please feel free to chime in or ask.