how are axles rated? is it more a third being added, or the capacity of each? like would 2 7500 lb axles be as good as 3 5000 lb ones?
It's the way the trailer is rated, not specifically the axles themselves on ANY trailer. The general rule on distribution on most trailers...
Bumper pull: 10% of the overall trailer weight will be at the ball in front.
Gooseneck: 30% of the total weight will be at the ball.
The advantage here is that you can indeed carry more weight with a gooseneck than you can with a bumper pull that has the same set of axles under both trailers.
Turning..... yes, you can make a sharper turn with a gooseneck, but they also don't track as well either. You will always need to swing out wider through a turn with a gooseneck trailer. A bumper pull will track you much tighter.
But, IMHO, gooseneck is the way to go. Bumper pull is for people that have a 1/2 ton and want to pull their bass boat once a month.
As far as buying a GN for $1500, it's either an awesome deal, or you'll wind up with something pretty junky. You'll probably need $3K or so, closer to $5K if you want tandem duals, which are badass.
I started building another GN last winter, but ran out of time before I needed a dovetail GN really bad in the field and never got mine completed. I went ahead and bought a Big Tex and payed $4500 for it, which is a steal around here. I've got another we built that has triples, but I like the tandem duals better, better brakes, more capacity, and longer life because the hubs and brakes are so HD.
