Going to run out of room problem

What to do,,, might all ready know,,, but your wisdom is sure welcome, just getting ideas.
Outdoor greenhouse is cattle panel about 6 foot high covered with plastic.... plants have been super cropped, topped many times and trimmed all the time..... these monsters are out of control.
back 2 are a sativa X and other 2 are Ice breaker and a honeysuckle.
Thinking about raising the green house another 2 foot giving me 8 foot high.... 10 foot wide... 20 foot long.( I know this was not enough but two plants are the same so growing it into one big plant basically ) . I didn't have a choice on length and just had too many cool plants again.
What about topping all side branch's and super cropping a shit load more, going to have to tie them down also.
I live in a 4 plant legal recreational state so worse come to worse I will just open the whole thing up..... just worry about rippers. I live in the country but you still get people snooping.
Horrible picture.

Maybe SCROG at 6 foot .... LMAO

The tallest biggest shoots are the dominant shoot where all the auxins are. You can break that top and pull it down then other shoots will fatten up and become dominant. If you keep playing that game you end up with a lot of huge buds instead of one dominant shoot which went untrained. Even when I top a plant a shoot wants to become dominant and make a mad dash for the sky. Don't let it do that. You can YouTube super cropping there are a ton of dudes that show you exactly how to bend a top without snapping it off. Honestly I think it produces more total weight but I have no scientific testing to show.

Looking at your plants again I would probably break a bunch of shoots or pinch them at very least.

Yup, not my first time growing by the way..... LOL

I would use some plastic string(so it won't mold) that won't dig into the stalks and pull those bitches down and out. Or your main idea of raising the roof because those babies look like they are not down growing vertically. Pretty looking plants man goodluck!

It will be ok, just let them grow into the roof and sides with fans running 24/7.