Trailers
With trailers, you get what you pay for.
I just changed to an all aluminum trailer with spindle axles. After years of dealing with galvanized trailers, rusted springs, rusted axles even rusted galvanized wheels on my boat trailers I wanted something with less maintenance. Also, I plan on a 2400 mile round trip to the keys with this trailer.
The galvanized trailer I traded after only one year (single to double) had only been in the water 4 times last summer. The springs were already rusting. Of course if you're handy, you won't mind using a torch to bust the springs hardware rust and changing them out when due. With minimum use, the springs and axle could last for years. Just depends on how much time you want to spend on maintenance and how many dollars you want to invest.
I saw about a $600 difference in price between galvanized and aluminum and that included the aluminum wheels + spare (double trailer). Worth it too me. You be the judge for your own criteria.
This trailer only gets dipped twice a year and is stored in the garage for winter.
Cost a little more but if you plan on having the trailer for long term, might be worthwhile.
By the way, a wash down with salt away (4oz) goes a long ways toward keeping the trailer in good condition.
LRC