Garcia!it's all up to you, tall and lean or short and fat...however you want it to grow
buena suerte
From the time you start flowering how much do they usually grow?Nice bushy looking start.! If 7 ft is your height you have a lot to work with. How tall you let them get would depend on how much light power you intend to use in order to get light penetration throughout the plant.
Short? Around what size you consider short?I've always tried to keep them short because indoor lighting doesn't penetrate like natural sunlight. The lumens are greatly reduced as you get further from the bulb.