If you want to grind 1/2NL at vegas, bring at least 100 buy ins ( $20,000 ), forget tourneys they will drain you emotionally and physically. This will make your cash game suffer and accelerate your loss. Then, you need money for lodging, food and transportation. This cost depends on your lifestyle.
If your goal is to soak up some Las Vegas
, have some fun while making money then come two days before the wsop calender starts and hang around the cash games and sngs. This predatory behaviour will give you "gto" to scoop up easier cash game money, despite the higher rake from people tired and distracted from the "wsop" experience.
Last year I made $30k from selling my sng sat. lammers and another $30k grinding cash during the wsop. Never played a tourney or wanted to. This is big money for someone who works all year to clear barely $25k after tax.
Know the real reason why you are doing this and tailor your plan and actions around that. Poker means a million different things to other people. I am only giving you advice from a person who relies on poker to pay the bills.