To hold tiny parts securely for painting, use Post-It Notes. The adhesive is just strong enough to keep the parts in place, while allowing them to be removed easily without damage. Just tape a Post-It Note upside-down to a scrap of cardboard, then lightly press the parts to the sticky area.

For the TL;DR - just scroll down an look at photos is useful since it's about architecture :) Feedback appreciated !

I want my layout to have a high level [ ... ]

Micro-Trains 2 Story Barracks Build by Modelersguild.com

These Micro Trains kits are nice, real nice. A few nights build time and you have a piece for [ ... ]