Nice interior UNCLEBUTCH!
I like the idea of being able to lift a roof off to reveal a neat scene. Your visitors, whether they are modellers or not, will go “WOW!”.
I strongly urge you to take the plunge into LED interior lighting! It really is very simple: LED + resistor + wiring and a power supply. You have to get the polarity right, but if you do it backwards nothing will explode so there is no risk. If you are going to make the roofs removable then you will have to build the lighting so that it looks like part of the structure. That’s just creative modelling. You do want to paint your models so that there is no light bleeding through the walls or coming from the outside of the window frames, but that’s easy to do too.
The best approach might be to choose a structure that you want to light and show us some photos. You will get lots of suggestions as to how to go about the lighting installation.
Cheers!!
Dave