I would look into warehouses in your area. You might be able to get a deal for a few hours a week as opposed to month to month. And I would ask your existing clients if they or someone they know has such a space. Even a barn or equestrian center might be workable.
I wish you great succes.
Check out my website sometime if you get the chance.
Anywhere is the U.S. I would be doing bootcamp in Scottsdale, AZ. I don’t really think you could call it winter over there.
Also if your doing a boot camp renting a place can be costly. I would look into a local church they always have a large room to use on a saturday or weekday sundays tend to be a bit busy. You can over offer the class for free to the first five church members who sign up instead of paying to rent out the room.