If you want to shoot money at a trailer, fine.
But I bought my aluminum triple axle trailer from Owens & Sons for $3500. 33' 11,000#GVWR. Brakes on 2 axles (free-backing surge brakes with salt flush kits - I love 'em). Big jack (3000#).
Loads/unloads like a dream ( I launch/load by myself). Pulls like a dream. Fits boat like a dream.
Turned them loose with the order on a Monday. Had it ready on Thursday.