A great setup for shooting negatives and transparencies can be built for a modest budget. For me, this was around £300.
I use a very robust mount used to support a computer display monitor to a desk with VESA 100mm mount.
A homemade camera support (with VESA mount) and adjustment from 18mm hardwood painted black and a standard Arca Swiss type clamp.
On the desk I have a small lightbox built into a 12mm MDF box this is sized to allow negative carriers from a 5x4 DeVere enlarger to be dropped into the top.
The lightbox is only used for focussing and alignment as I have a flash unit mounted on the side of the lightbox with a diffusing screen.
For my Nikon Z, I bought an excellent old lens the 105mm AI f4.0 macro and the dedicated extension tube for this lens to obtain a perfect 1:1 shooting ratio.
This setup works perfectly and using a flashgun for the light eliminates any camera movement.