It goes without saying that it is not necessary to buy a bottle rack. Of course, you can also build and assemble it yourself. However, you will need a certain amount of experience and a little time and peace of mind. For a simple bottle rack, you usually need one to two days until it is finished, including the assembly.
With a little patience, you can also adapt the rack to your personal needs. You also need to make sure that the bottle rack is stable and solid so that the bottles do not move and fall out.