Depending on what you day trade depends on what your budget needs to be. If you are going to day trade stocks you need at LEAST $10G to start.
I set a profit target of around $300/contract and a stop loss of about $200/contract.
Your budget will drop with different types of trades, Forex, Futures, Stock Options etc. For example with Forex a good recommended beginning balance is only $500 vs. $10,000 for stocks.