Take Your Sauna with You
If you aren’t ready for a large cabinet-type unit, there are still more options: portable sauna domes or tents, the “sauna-in-a-bag” design, and personal sauna suits are other types we can mention. The latter one looks like a silver space suit and is worn around the house while you do housework, while the sauna bag is can be either a washing machine-shaped thing that you sit in with only your head sticking out at the top, or a long sleeping bag.
I am thinking something like, "No, I am not a nerd. Why do you ask?"