Challenge accepted for amusement's sake.

I made a simple example in Blender

You will need to import mini-golf.zip yourself. I haven't seen how well it looks in SH3D. It needs a lot of cleaning up as the curve conversion created way too many vertices. Worth a test drive to see if it works for you though.

Since most mini-golf is really just a bit bit of grass surrounded by a kerb with a hole in one end supporting a flag, you would be better off making the course in SH3D and just adding flags.

So here is a hole with a flag in it.