Yes and yes on those last two. Even if it was 1200# that was my planI only meant expensive compared to going cheapo with wood, ready-built is very poor value.
not at all meant to discourage you, DIY is the way to go
Just go as absolutely light as you can every step of the way, spend the money, ideally shoot for 1500 dry, your van's transmission will thank you.
ideally get a temp gauge and dedicated cooler for it
And put electric brakes on the trailer