The answer depends on how much the person actually needs to make a living. The basic math of "how do you get there?" is something a serious trader should know before attempting to rely on trading as their sole income. Can a trader just be "profitable" trading a $30,000 account. That's a clear yes.
What you guys conveniently forget or willfully neglect to admit is that having $30K as a seed money is not itself a guarantee for success. It doesn't matter how much you start with. You can start with $100K for all I care. The question is does he have the trading skills to stay afloat month after month. Otherwise, discussing how much money he has is meaningless.
If you trade options on futures you will be able to achieve your goal with minimal daily screen time or effort. You have correct sized account. Options provides leverage, lowered risk, and reduced margin requirements.
I take it that this is not a question, but a comment that you have experienced trading this way and it did not work well for you, of course it would be unfair to question the difficulty, ease, or viability of trading options on futures -- guess you are doubting the ability of anyone familiar with options/futures basics and learning how to do this with a 30K account?
I would suggest either using a prop firm if trading stocks or trade futures. You have more than enough money to enroll in a prop firm which gives more leverage.
I must be doing something wrong I have a well capitalized 7 digit Portfolio Margin account and I don't make 10K trading daily. (I trade SPY options)