Would you stick with your original design and risk spending far more than planned, or would you scale things back to protect your finances?
I love that people are willing to take a risk and build something they've dreamed about for years, but I think I'd struggle once the costs started spiralling. There's only so many times you can dip into savings or push the budget further before you have to question whether it's still worth it.
I also wonder how many people would make the same decisions if they knew the final cost before starting. It's hard to walk away when you've already put so much time, money and emotion into a project.