Wow! That's fantastic! I think you should do the interior of all your buildings. It's a lot of work, but in the end, you'll be glad you did it. I'm building an old west town in 40mm scale, interiors included. It's a lot of extra work (especially EVERYTHING being scratchbuilt,) but the games we've played with them have been, bar-none, the best miniatures skirmishes we've yet played.
Then again, my interiors are basic and utilitarian, whereas yours are a magnificent piece of art! Though, if I know terrain builders, in the back of your head you know you want to build nice interiors for ALL your structures
Carmen
http://carmensminiaturepainting.blogspot.com/