Those poor fellas need decent soil (I like FoxFarm Ocean Forest), good ventilation, and 24/7 of decent lighting. The difference between a plant given all that it wants and plants that are starved for lighting, nutrients and/or ventilation is tremendous, like a factor of 10 on yield. I totally understand being broke though, having been that way many many times, but if you can improve the plants' environment, they will definitely reward you later.