There are many places where you can buy heavy equipment. The best place I have found is on www.machinerytrader.com
www.EquipmentTraderOnline.com They are the best source for buying and selling new and used heavy equipment. They are a classified ads website, but you can find some good stuff there. You can sell your own equipment, new or used. The equipment you can find or buy can be farm equipment, construction equipment, forrestry equipment, mining equipment, lawn care equipment, equipment trailers...
Chances are you can find equipment like that online on Craigslist or ebay. Both sites specialize in unique equipment like ice cream trailers.
Yes there are places online where you can go to get information on sellers of gooseneck trailers. You can fo to www.kaufmantrailers.com/.../Gooseneck-Equipment for some help.
Finding a used trailer that can hual BBQ equipment can be very difficult to find at times. The best place to look to find one of these used trailers is the website Craigslist.com.
At many sotres you can as they can order them if they do not have them in stock. You will have to inquire. If you want them installed there then you will need to ask if they have the equipment to do trailers your size.
Heavy Equipment Trader, Ebay Motors
You don't need a licence to buy a trailer, no. Make sure you know the laws about towing trailers though
There are several different sizes of concession trailers available. It really depends on which company you are planning to buy from as to what size they make. Some concession trailers are small like a hotdog stand while some can be as long as 18-24 feet. You will need to choose a size according to how much equipment you have to fit inside and how many employees will be present at a given time.
You can buy one from Projuice Limited - they do all kinds of juice and smoothie supplies and equipment. You can see the van at http://www.projuice.co.uk/bar-equipment/mobile-catering/mobile-juice-vehicle.asp. They also do trailers.
You can buy livestock trailers at www.fthr.com, or www.trailershopper.com
You can buy concession trailers for a good price at: http://www.jrpconcessiontrailers.com/
You can buy a trailer from Kawasaki of Caldwell, Texas. Kawasaki of Caldwell has a large selection of trailers to meet your requirements and your budget. They offer only high-quality trailers built in the United States of America. Their CM trailers, Galyean Trailers, Diamond C Trailers, Haulmark Trailers, Neckover Trailers are all made in the great state of Texas. To know more visit Kawasaki of Caldwell, Texas