How much does a trailer for a 21 foot boat cost?
For single-axle trailers that carry boats in the 16′ to 21′ range, you can expect to pay between $2,000 and $4,000.
What size trailer do I need for a 25 foot boat?
If you have 25 feet (7.6 m) long pontoon boat, you need a double axle or tandem trailer with increased capacity. This trailer type comes with two tire sets and can carry a boat weighing up to 4,800 pounds (2,177 kg).
Do boat trailers hold their value?
In theory, a good used trailer as part of a boat package will retain 70-95% of its value. So owning the trailer will cost very little when all is said and done, give you way more flexibility and choices, help you sell it quicker and get a better price for it, and be better for your boat in the long run.