I run a small architectural practice out of my basement. For three years, it's worked well enough.
I recently found a business who have a whole floor of an office building, and they rent one room office spaces at a fairly low rate.
Common photocopy, fax, coffee, boardroom.
The office is a fourth floor office, the same size as my home office occupies now, but with wall to wall, floor to ceiling winodws.
I really need to see the sky.
I could suffer the cost, if I didn't recoup it in jobs, and it wouldn't break me.
What costs am I missing?
-lost time moving and setting back up.
-moving to a full time unlimited cell phone plan
-new furniture if needed (might get away without) space comes furnished with two traditional desks and two chairs. I have my own good chairs I'd use.
I gain the use of a board room and the freedom to meet clients and consultants at my office instead of a coffee shop, or amongst my kids' lego.
I get to see the sky, and other human beings who aren't my family.
Downside might be sitting at an office building at 10pm, often. At least when I'm working late, now, I can go up and bug my wife, or take 20 minutes to harass the kids.