Dont think that gonna work you bring cold air inside even if you have a heater you gonna bring more cold than heat and that create condasation. Condasation and electricity’s its not a really a good idea why not put you tent inside. Thats just my idea maybe more people have different idea.
You need to bend more next time but your plant look good it may fill up more . I fill a 4x4 tent with one plant last time with 2 month veg with lots of super croping