According to Tractordata the 404 is around a mid to high 30s horsepower tractor and only weighs 3,260 pounds. I would not want to try lifting more than 2,000 pounds at the rear.
Just my 2 cents.
I would say somewhere around 3000lbs as a max. 2000 to 2500 comfortably. That would be at measured the pins.
After looking at all of the no-till drills, I'm leaning towards the Tar River SAYA-505 due to price and weight. It looks like the empty weight is 1,036, and I'll only be planting an acre or two at a time so I wouldn't be adding much weight in seed. I'm thinking that is my best bet.