I tie mine down horizontally below a vertical screen and force the sideshoots to grow vertical. One LST tomato can fire up a lot of vertical sideshoots which fill a vertical screen pretty fast. Tomatoes have the big plus that they will throw out roots where they touch the soil. The additional roots easily support the extra demand from the vertical sideshoot growth.
Probably easier to just use 10 vertical tom plants and nip out the sideshoots but its an interesting experiment