You don’t have to use a tent in a basement (I don’t). You do have to lightproof the plant area to keep the 12/12 dark enough. I used panda film, hung it from the rafters. White side facing the plant, of course.
IMO, you have a lot of room there, just not much height. Get the plant as low to the ground as you can (can you put the pot on the floor?). Keep the plant as low as possible (see @Arrow 's labor of love).
I think you’re going to have basement issues more than height/size issues. My basement is ~52%RH, and to get it down to the 40s takes a lot, I have to dehumidify most of the basement…