"As an artist, I want good art."
As an artist, I also want good art. I also want to live in a house, eat food and have access to medical care, which requires money. If you end up bankrupt and unhoused because you gambled your entire existance on a project whose success chances you vastly overestimated, you will not be happy about that.
I'd also argue that being housed, fed, medically cared to is a prerequisite for making art - especially video games. If you freeze to death under a bridge, you will not be able to make art afterwards.
If you dump 11k of money you just have lying around somewhere and don't need for anything else into your passion project, that is one thing. But from what you describe, it sounds like you do not have any income stream and are selling off vital items because it is your only way of funding your passion project, and that is a dangerous path.