i get it, a tent is far easier, but you are tight on budget. i made boxes with plywood many times, build a frame and close it with plywood. I used to place a black curtain over the doors from the outside. I finally resorted to thick wood for doors and shelves, cardboard for all the sectioning walls. I like it for the ease to cut in it, to paint it, and to glue it. I use an old metallic water pipe as my rail. If you are not a handy person with tools, I can imagine how such a job can turn into a nightmare. Back when I started, a grow tent was not common, and I didn't know better than drilling in a wall, and i spent a lot on diy. I totally get what DGF is saying, i am only saying that if you have no budget for a tent, with some effort, you can save a good sum. Think of how to build a frame for that space, and the rest is easy. you can also use drywall gypsum boards for cheap. if you have a 90degree corner already in the room, think of making a single pole for a diagonally opposite 90 degree angle, from that pole, you place 2 perpendicular walls to form a rectangular closed space... I know dgf is thinking "nooo" lol and i don't know your handyman capabilities so he may or may not be right... cheers to you and to DGF