A small charcoal BBQ should suffice if you're feeding a small family and only plan to use it once every so often, as they're harder to clean than gas barbecues. Even if it means two rounds of cooking because you can only fit four burgers or sausages on at a time, it's probably better value for money if it suits your needs. Gas barbecues of the 4 and 6 burner variety are better suited for medium-to-large catering. Maybe you have 10-20 people round for a barbecue and you want to minimise cooking time so you can spend more time with your guests. This type of barbecue is best for you.