Consider what the metal structure will be used for. Will it be used as a carport, garage, storage shed, or something else? Knowing the intended purpose will help you choose the right size, style, and features. 

Determine how much space you need for the metal structure. Consider the size of the items that you will be storing or parking inside, as well as any future expansion needs.

Choose a suitable location for your metal structure. Make sure that it is level and has good drainage. Also, check local zoning laws and building codes to ensure that you are allowed to erect the structure in the chosen location.

Decide which material you want for your metal structure. Common materials include the choice between 14 Gauge and 12 Gauge steel tubing. Each has its own benefits and drawbacks, so do your research to choose the best one for your needs. In most cases 14 Gauge is the most affordable and also typically meets local code requirements unless you’re located in a high wind or heavy snow load area.

There are many different styles of metal structures, including gable, barn, lean-to, and A-frame. Consider the style that will best suit your needs and complement your property.

The type of roofing you choose will depend on the climate in your area and the intended use of the structure. Options include steel panels, shingles, and corrugated metal.

Think about the type and number of doors you will need for your metal structure. Options include sliding doors, overhead doors, and roll-up doors.

If you want natural light inside your metal structure, consider adding windows. You can choose from fixed or operable windows, and you can also choose the style and size of the windows.

Depending on the intended use of the structure, you may want to consider adding insulation. This will help regulate the temperature inside the structure and protect the items stored inside.

Finally, consider your budget when purchasing a metal structure. Compare prices from different suppliers and weigh the features and benefits of each to find the best value for your money.