As Austin Kleon highlights in this post:
It is curious to me how often, when people quote Woolf, they quote the room part and leave out the money part — especially when you consider that money buys you both the time and the space
I’m not sure why people leave that out, but it’s an essential part of the freedom required to create fiction or any other artistic endeavour. The money frees you from the basic needs, just like the room gives you the social freedom you need. You can still create art if you are weighed down by poverty and responsibilities, but it’s harder.
I recommend that post by Kleon, and Kleon’s blog in general.