I did a quick google which said that in SF, office space is $80 / sq. foot, I presume per month? Assuming you need idk, 15 - 30 sq. foot per employee (not even counting shared spaces), that's $1200 - $2400 / month to be added to your wage, plus a bit for expenses like desks, coffee or lunch that are normally offered by the employer.

I read another post or article that made the statement that if you work from home, you should be earning enough to have a bigger house with dedicated office space. Of course, working remotely would also mean you can move around the state or country where housing prices are lower.

For me, I bought a two bedroom house a few years ago; it works for me, I have my desk set up in my bedroom, quite comfortable but I would still like a dedicated work / hobby space, so if this work from home keeps up, long-term I'm looking at moving back to where I grew up in the north part of the country (NL), where houses are bigger and cheaper than they are over here.