I'm sure your building would look great, i love that first image you posted! i kinda struggle with straight lines as well, but i always draw free hand. Even if they're not perfect, i don't mind haha.
I would tend to agree with you about drawing stoned, but with this particular piece after a heady sativa, all the cross-hatched lines start to get really trippy. Makes me get distracted and loose my focus on the intricacy!