I'm glad you figured it out, and I'm kind of surprised you didn't get a response here. I added wind sim to my Playseat Trophy rig with an Aruduino Uno, motor shield, and two 120mm server fans from Amazon. It cost me about $75 US all in. I added a spare 12v power supply I had laying around, and 3d printed a couple of fan shrouds.
Once I had it all installed and working, it made it super easy to add a couple rumble motors I salvaged from broken PS4 controllers with simple 3d printed brackets and zip ties.
I liked this setup so much, I replicated it on my folding wheel stand rig I leave at another house. This time I used smaller computer blower fans. I've got a couple DIY videos on my YT channel.