After they come out of the EZ Cloner they go into 6" pots. I let those grow tall, usually 3-4 weeks.
Yes, when I transplant them into final pots (3 gal nursery buckets), I plant them literally parallel to the ground. I do not have a recent pic of this, but here is one a couple years old:
I don't use those large screens anymore, now I just run a piece of bamboo between buckets and use these little wire "S" hooks I make as needed from about 18ga wire. They stay like that for 2-3 weeks. The side branches get a chance to mature as well as the "top" continues to get longer, but I've reduced the overall height of the plant by probably a couple feet with the same plant growth/maturity.
After the "S" hooks are removed the plant springs up of course, but remains at about a 45 degree angle, and nice and full. As you will see below, the space between buckets also fills in with greenery, creating a full canopy by the time I switch.
I recently posted about the trellis I created. I originally made it from wood but had the idea for PVC just as I finished the first prototype. Here is a picture of it:
Just 3/4" PVC, special fittings bought online, cup hooks installed every 6", big rubber bands from Walmart. It fills in nicely:
The fittings allow for expansion horizontally and vertically. Here it is with a second "story":
Yes, you can buy grow tents in many sizes, and they are quite reasonably priced. I would suggest that if you do go with a tent you don't need my trellis at all. Maybe tomato cages, placed on the buckets at transplant time (no LST). A large tent (approx 5' x 8' x 6' tall) is around $250 at HTG. I use one of these for drying as well as finishing up a few plants.
The tents are great. They are reflective on the inside, zippered access everywhere, special outlets for venting and lots of structure to hang stuff from. They just aren't that roomy. You can grow 8 good sized plants in the size I mentioned. If you have the room, ambition and $ I would build a room; depends on the size of op you intend to have. You could always start with a tent and then expand later..it won't go to waste.
Good luck!