If you know that you want to keep plants you are better off buying everything for plants in the beginning.
The Walmart aquarium has worked very well for me for a basic community fish set-up. It is not a "piece of crap" but has stood up very well, I've had this one close to 2 years and only replaced the heater and that was precautionary. The filter is weak, absolutely, and if you have cichlids, goldfish, or other heavy waste producers then the filter is worthless. If you want to grow high light plants, the lighting is worthless, just like any standard lighting is. But if you just want an inexpensive start to the hobby and want danios, cories, tetras, then the Walmart set-up is a great deal.
Jackie