If you are obtaining good results then this is not the time to give up but it is also not the time to scale up your operations and give up your job either, without a doubt doing both is hard but you need to keep this going for at least a year, this way if you were just lucky then you will eventually see this in your results and you will still have your job to earn an income instead of depending entirely on day trading, but if you can maintain this over the long term then you can begin to think about trading full-time and give up your job at the time.
You are right about giving it more time because he only have a medium experience so far as he only started a few weeks ago. We don't know maybe this is just a beginners luck and we are still in a bear market. He may need to be exposed first in different market situations so that it won't give him a shock which can affect his trading performance. What he can do for now to lessen his burn out is to allocate lesser time in trading. If he don't want to, then he can try using a trading bot.
This should help him automate his trades in the background while he continue working on other things. In my opinion, a full time job is still better as they are more stable and had lots of benefits over trading so I won't drop him, no matter what.