Do you have enough patio or yard-space to do container-growing? If so, you can probably go to a restaurant or deli and pick up 5-gallon pails for free, and grow your plants in those. My wife and I have a nice garden, but we also like to do container-growing on our back deck. It's great to be able to go just a few feet to pick basil, sage, cilantro, etc, and cherry tomatoes seem to do really well in containers, too. Your largest expense in getting started would be buying bags of topsoil and composted manure.I really like the concept of this product because I am a renter and the little bit of soil I have sucks! This seems like a portable way to grow a few tomatoes and herbs-there is also one for strawberries! Any more input on this product I would love to know, we are considering getting a couple of them with stands.
You should also get some mulch to place on top of the soil/manure mix to minimize the splashing of mud during rains/watering. That will help prevent collar-rot in tomatoes, a real weakness of the Tospy Turvy system. Plus, you will save the $10+ per planter and the cost of the stands.
BTW, if you don't like the color of your free 5-gallon pails or there are logos on them, just buy a can of spray paint and make them any color you want.