To calculate the max weight of a trailer for your SUV, start with the TV's max payload and work from there. The most limiting weight for SUV's is usually payload. The loaded up trailer's tongue weight will be between 12 - 15%. I'll use 13% in my calculation.
1230 - 530(family) - 80(distribution hitch) = 620(available for trailer tongue)
620 / 0.13(13%) = 4,769 max trailer weight.
Now subtract the cargo(1000Lbs) that goes into the trailer to get the dry weight.
4769 - 1000 = 3769
So based on your payload capacity, a dry weight trailer of 3769Lbs is a good fit for your Sequoia.
The Keystone Bullet 2070BH comes in under your weights.
This is exactly why I found a 3/4 ton Suburban to pull my 5700 dry, 7200 loaded, 1100# tongue Bullet.