I know the owner of the business which did the painting, so I got the
friends and relatives rate. From what I can tell the total cost of
sandblasting and painting would be in the range of $3000 to $ 3,500.
The rust on my trailer looked much worse than the actual condition of
the trailer. After the sandblasting was done, it turned out that the
metal on the trailer was in pretty good shape. The fenders had holes
in them, also one of the hull support pipes was jammed inside the
cylinder in which it rests, due to rust. The cylinder had to be cut
open to free the jammed hull support pipe.
One other thing to be aware of, you have to put the primer on as soon
as the sandblasting is done, as otherwise the bare metal starts
taking on rust almost overnight.
Also if you are buying new nuts & bolts for the trailer, buy
galvanized nuts & bolts.