If you are talking just expenses of being there plan on about $80/day for the room, about $40 for food if you eat breakfast, lunch and dinner in the restaurant. $3.00 for a beer and $15 for a all day pass. Naturally you can get by cheaper if you share a room. Bring some of your own food or go out to another restaurant. Have a cooler in your room with beer and etc. If you play in the tournament you get free admission and some green time otherwise table time is $10 per hour.
For the amount that I spent for a weekend (2 nights) sharing a room, gas, meals, beer, admission, etc $224.13. Plus $1620 for a cue, $112 for books, and $15 for joint protectors.