Not arguing that losing 40lbs isn't doable, just coming from the direction that who's to say 200-210 isn't already a reasonable weight at his height and build. Perhaps that 40lbs has already been lost. Another example, I'm only 5'8", but given my frame/build, 170 for me is the absolute lowest end I could reasonably achieve, that would include insane dieting (borderline unhealthy) and exercise I simply don't have time for. I'll be happy at 180-185.

And +1 to the custom build idea if OP isn't married to buying factory built set.