@Kenmo
Substance Modeler will work like a Desktop App
if you like to work in Desktop mode no VR Headset
is needed. But if like to model via VR Headset you
can do that, with the same App so its 150.- euro
one time fee (on steam) for both options together.
MacigaCSG is a bit different in its modeling philosophy
then Substance Modeler, SM offers a few more
Export and import Options.
By the way: If you cancel your Patreon support for MagicaCSG,
you can continue working with the last version you downloaded.
You can reactivate your Patreon support again at any time.
Metin Seven is a great Artist with MagicaCSG
do a google picture search or youtube.
As i mentioned in a Previous post in this Thread
there is a big Thread in Blender Artist Forum about
more less any possible SDF-Modeling option out there.
Here the Link
https://blenderartists.org/t/the-big-sdf-thread/1293075
Womp 3D is an online SDF Modeler, there is a free Version
where only a Account is needed. The free one allows also .obj
export/download.
Here the Womp Link
https://www.womp.com/