Lasko industrial blower. You can probably pick one up at the local Home Depot, too. My workout room is a small storage closet and this works really well.
Hopefully with your 3T back you’ll be able to get into a cycling routine and find some easy, safe ways out of the city. Even though I have lived in (somewhat) rural areas for many years, there haven’t been entirely safe roads to bike on, especially in the dark, which is why I do a majority of my riding on the trainer. Prince William County, VA is pretty rural but they are asphalt-happy here, so I need to drive 20-30 minutes to find any gravel longer than 2 miles. Totally worth it, but requires planning and an additional hour total.