Mothers

I've got 3 beautiful WW moms that have performed great! I have taken almost 50 clones from them and over the course of this year have harvested some GREAT bud. They are vegging under a bank of T5s and have outgrown the space I have for them. I REALLY want to flower them but the fact that they will triple is size means I don't have space for 3 twelve foot monsters in my basement hydro setup.
What suggestion do you have to flower these. Should I flower them one at a time? What kind of tying and training can be done? Would these survive a transfer to the outdoors to continue growing and flowering this fall. The fact that they are hydro probably means that can't go outdoors?
I'm open to any ideas you might have,,,,,,,
THANKS

I have successfully taken a 10 inch clone off of a plant i needed to sex. just chopped one of the 4 main branches off and used a tomato brace, "the circular kind" with a clear vegetable bag over it like a tall humidity dome. Hopefully someone can give you some advice aside from this but I would either start training the tops down to cut the height in half over the course of a few days, or just chop off the top few feet of the canopy and turn her into a short bush. Then flower or continue cloning.

I had my ww grls get really tall as well. I just slowly tied the branches down and all the bud grew up it worked out amazing. Plants are now 5ft tall and 6+ft wide. It made me wish I had about 6 more hps to get some good light coverage.