Your diagrams alone are just amazing Glassman. Truly amazing...
For the buildings/towers - I think I have figured out something that *might* work for some sort of centerpiece to the city area, or for the spaceport... it's a 3 foot tall tower from a different toy line. I bought it a while ago, and started painting it. Originally it was intended for just part of my collection, but I am going to try and get it finished very soon and take pics... it is very durable, is going to be in the classic "Imperial gray" and I think will be a great addition to this. It's nice because it's only about 1 foot in diameter, so won't take up much space but will be tall.
Phruby... if it's ok once we get 100% approval... I hope you don't mind that I am planning on sending all my stuff that I am making to you for this. It will be a very large shipment.
Probably the tower, possibly a second tower that Owen is making for me, at least 2-3 vehicles, and anywhere from 10-20 figures. And of coures some money too to help with your expenses, and hopefully you can ship most of my stuff back later in the summer.
Right now I'm in a panic trying to get my basement finished, because I have to move my entire Star Wars collection downstairs very soon, and then get the baby room ready (it will be in the old Star Wars room). I'm sorry that the timing of the first child in my family is going to be right around the time the actual celebration is supposed to take place.