Quoted from dr_nybble:If you want a 3D rendering try https://www.sketchup.com. I designed my basement renovation with it.
The graph paper method works well for quickly shuffling around machines and figuring out how to optimally cram in as many as possible.
I second Sketchup, I use it for designing all home projects. I would recommend watching a quick YouTube tutorial about Components vs Groups in Sketchup, makes things much easier.