Just because heavy punching bag stands are available, it does not mean that you have to have one, but they do have advantages. If you have a gym at home, or sole use of a large garage, there will be no problem, but as they are rather cumbersome, you will definitely need a large space. Just because the stand with fit in the area you have, chosen does not mean it is suitable for you, as you still need room to move around.
If you are planning to kick box as well as punch the bag, you will need yet more room. As well as you moving, there need to be room for the bag to swing too and fro. Depending on where you live, you could manage without a stand. If you live in a house with a garage, you could arrange to have it hung from the ceiling of the garage. It would have to be a solid building to allow for the bulky weight of the bag and the movement, but far better that than tries in the house.
While at one time, the only option for a punching bag was a hook from the ceiling. In your own home that can look unsightly and may not be entirely safe, but if you rent it may not be that bad. Living in an apartment will also be a problem unless you want to drag your upstairs neighbour down into you training area.
The current crop of heavy punching bag stands is a vast improvement from the hook. The L Shape stand is still a popular choice for both men and women, the single stand is not dissimilar to this but they do not hang from there and the single stands are not secured to the wall. If you are not a person who will be using the bag every day, this might be the bag for you. A simple hook at the top attaches the bag, and when you have finished, the frame folds up and can be put away.
The double stand gives an extra option to the person who is more likely to train on a regular basis. It is also ideal if you want some variety to the training session. As well as the large back, the second hook is meant to hold the speed bag. It is also able to hold a second full size-punching bag.
The third type of stand of more aimed at the person who is serious about this type and training and will do it regularly. They have the full range of bags, and with this stand they can all be displayed together for ease of use. While there is a difference in size, there is no difference in quality. You may be best to shop around for your heavy punching bag stand you want however, as there seems to be a wide range of prices for what look to be similar products.