If we decide to buy a barbecue, we should buy a quality, versatile and robust one.
Enamelled, or in stainless steel, equipped with a practical basket that collects the ash. Maybe with very sturdy wheels and legs and a GBS grille, that is a removable grille.
Long-term heat stress can damage your equipment. Another important factor is the resistance to corrosion, the barbecue left outdoors for years could become unusable.
Choose a product that allows you to have spare parts over time, or maybe if you are a DIY pro you might even plan to build your own custom one.