Salary of $120k per year in san diego leaves about $98 per day on the table.

yearly salary $120k for single person

Monthly in hand after tax deduction $6500 . about $216 per day income

daily expenses per day

$6 grocery

$3 car insurance

$4 gas (today gas price$5.6 per gallon)

$78 Rent (not sharing apartment)

$7 electricity+trash+water

$3 food (try to make it at home but sometime not possible)

$4 renters insurance+dental+eye

$5 emergency back up fund+ clothing + (will buy a home one day fund if mortgage is ever1%)

total per day about $118

216-118=$98 left