A trailer can be a flatbed or else an enclosed cargo trailer. Flatbeds are cheaper and more widespread but do not have the advantage of protecting cargo from weather or thieves. Almost all trailers require reasonably strong engines to haul cargo, especially over the highway where drag and inertia can place an excessive burden on a mediocre engine. For anyone who needs to find truck trailers for sale, an excellent depot has a wide range of options for a private hauler.
Small cargo trailers have the advantage of not requiring a license in most locations. Renting a hauling van can be expensive, and it is a middle solution to someone operating a business but not wanting to purchase a commercial drivers license that would be required to operate a a semi-trailer truck. Many areas allow people to open businesses as small cargo haulers without requiring a CDL, and plenty of customers have small parcel needs.
Plenty of lawn and garden experts need trailers in order to haul lawnmowers and other mechanized equipment. Exterminators and electricians need a van at least, and for big projects they might bring along a portable shop in the form of an enclosed trailer. These license-free solutions can be an incredible boon to a variety of small businesses.
Of course, the biggest group of people to use truck trailers are just ordinary country people who need to haul lumber, furniture, and other objects from house to house or to a private project. People in cities might depend on professional services to move their furniture, but such services tend to be less formal in smaller town. A person does not have to be rich in order to have things to haul, and in fact the biggest fans of truck trailers are ordinary folk who prefer to skip the moving fee.
As mentioned, trailers generally need strong engines in order to haul more than a few hundred pounds. A prime example is the power of a mid-sized truck. Ordinary cars can be rigged with ball sockets for trailers, but pulling more than a few hundred pounds would create a great deal of stress on both the engine and the breaking system. Even large trucks with strong breaks must be careful when decelerating.
Trailers come in a variety of sizes because personal needs can vary. Cheaper flatbeds will suit the needs of many people but might not be able to carry much more than a thousand pounds. Larger flatbeds also have stronger tires that can carry more weight. The weight capacity of each tire is more important than the size of the bed. Choose a trailer based on expected needs.