This will be my third and last (for a while) setup in which I will be housing my third colony, I plan to keep just as much ants ant once to be able to do normal maintenance. Anyways you can find my other projects about my Ytong nests so without further speech here is my planned 3D printed ant formicarium:

The basic idea came from the AC nests on the store, sadly I couldn't afford buying one as the original plans were because I couldn't pay the shipping fees, so I will be contacting a local 3D printing company to have this printed on material cost basically. I hope they don't mind and I will be happy to share the files of this one if they need.
This is the main nest part, half is full but the other is without a floor, this is because the moisting stuff comes underneath this.

"Moisting stuff", the furthermost part will have cotton which slides underneath the main floorless part, it will be watered from outside except when cotton change is needed.

Nest part from bellow, I will glue some anti mosquito nest or something like that to the floor less area so the humidity can pass thru but the ants can't

+1 Random image, you can see some measurements on it (width of a passageway) and the two tube connections are visible as well.

Will be posting more image when I had it printed, will depend on the availability of this technology around my area.