Thanks for the comments
@ SCEtoAUX - I use a knife and sharpen it quite often. I tried cutters with separate blades but didn't like them. Either the blades are more flexible or I don't hold them as close to the tip but I find them less precise, particularly for thick card parts.
@ David - Indeed
The “tower” on the other side is much simpler. It includes colorful roofs. The detail over the entrance takes time to cut properly…