I think the next step after I primer the roof pieces will be to begin the tapewire process. Russ suggested I leave both floors as separate until absolutely necessary so that it is easier to work on both floors. He also suggested I make it so that the second floor just plugs into the main floor. I think he's on to something! Unless I decide to run power to the 2 interior walls for the upper floor, I can basically attach the small roof sections, run the tapewire, install all the plugs for the ceiling fixtures, install the wood floor, and leave the partition walls and front roof piece for last. That way, I can paint or paper them before installation and that is so much easier!
This is where things start to get both exciting and frustrating! You see your vision coming to life, and you have all sorts of little issues to work out. It makes the achievement so much sweeter, tho, because you have to get creative!
Here are a couple of inspiration photos for those of you who have a hard time visualizing what I have in mind for the end result. Hopefully, it I'll be able to incorporate some of these ideas, even tho the space I thought I was working with has been dramatically reduced.
Wish me luck!