More plants=more problems, more work, a bigger charge if you get caught, and more manicuring, which leads to your hands aching. If i were doing a small grow id say try some autoflowers or small growing plants. SoG, or Sea of Green grows if you havent studied up, is a system where you raise a bunch of small plants. Its more meticulous, but some people just plant seeds and grow em in the 12/12 photoperiod for their whole life, resulting in small plants with buds. Im not sure if its the most efficient for a big yield, but some people try it. If you want a couple plants and have not too much room, you can try training it to grow however you want. Just remember youll have to pick out males if you find any, i dont think anyone wants seeds in their bud.