Roast my new setup

The last time I posted I wanted some direction and I got it. I have since failed with those plants and convinced my wife to let me buy a 4*4 tent with pretty minimal accessories, mainly stuff I have around the house that isn't used. Little space heater because the basement is sub 65° consistently, a humidifier and better lighting with more safety precautions. The plant in the middle is a newer one and the one on the right is an attempt to reveg a failed plant(no hope here, for science). What else could I change without spending tons of money to help ensure a better grow?