Like most of these questions on this forum it comes down to savings rate.
if your savings rate is 50% of income or higher FIRE is really close. If not it's further away. What are your goals? Do you want to FIRE at all? Do you just want FI?
$900 a month (10,800 a year) on just housing is like 1/5th of your income, that's below the consumerist idea of how much mortgage you can afford which is like 30-35% of income.
If you max a 401k at $18,000 and max an HSA at $3700, that's a 43% savings rate straight out of your paycheck that leaves you like $28,000 out of 50,000 for taxes and bills etc. That's a pretty low tax bill, but even after housing your still sitting on like 15k for food, other utilizes, car, entertainment, travel w/e.