A system to print these maps in 3D

So I have been on a search to find a program that makes it easy to make 3D printable maps for roleplaying. The problem is that there isn’t any. So why not, make it so you can 3D print these parts? Make a system that makes everything connectable. So walls has a little hole on one side and a connection part on the other. Things that is on the wall has a connection “rod” or something so you can place it there. it would make it so cool to see. And while we are at it, why not make it so you can do this is VR? it would be really cool to see, you can see how it would look on your table and you can test things.