I finally got to read your whole worklog. Sorry to hear about all of the bad luck with this project but everything looks amazing. The paint booth was brilliant (might have to try that at some point). Personnaly, I won't buy stuff online until I've researched a company first, especially for pricier stuff like electronics. From what I can see in the pics, it looks like you did a good job of capturing the style of windows, especially that you just free handed them.
Best of luck finishing this beast.