parts for brakes
As an estimate for you, I just had my brakes rebuilt(93, 23.5) for $250 parts, $250 labor. This was for the backing plate, wheel and master cylinders, brake lines. Also, you would have to get the brake drums and pads. I would not tow at highway speeds without trailer brakes( unless you are towing with a vehicle like a suburban, 35% of towing capacity). People do take advantage of tow vehicles(cutting off, then braking to make their exit, etc.) As stated before, check your local laws, most require brakes if over 2,000 lbs combined weight('93 23.5 with trailer= 3,500 lbs,empty). I have made many trips with mine, recently towing from Md. to the Fl. keys( 2,400 miles round trip ). Maybe I am lucky, but have ony had to replace brakes(after 6 years saltwater use). Any trailer under that much load is going to shimmey and vibrate, and any literature on trailers emphasizes tightening hardware. When replacing bolts, use only hardened bolts, which have a number on the bolt head.