I've done the cnc, milling, laser, waterjet and some of the powdercoating.
The frame was too big for me to do it myself so for $600, a company sandblasted and powdered it.
My welding I don't trust, so I pay a welder who does that.
The ratio I believe is more like .75 on the front. Maybe 350 lb would be better? We will see how it rides. The springs are only $43 and I probably will buy another set or two later? Hopefully not.