I started with a steel stock trailer and once they start rusting it's near impossible to stop the rust I now have an all aluminum stock trailer which will never rust and is much lighter than the same size steel trailer. We also have one and two horse ultra light Brenderup trailers in the family. If I'm only hauling one or two horses I'll use one of the Brenderups as they are so much easier to pull and get around with. Big is great but there are also advantages to small.