Some people think aiming to lose 175 pounds is insane. For me, it is the only way to get there. When I've set "impossible" goals in a business setting, I've always made them. I get excited and motivated. Small goals don't interest me at all.
Most people have what is called an "alert-number" when it comes to weight. That number varies from individual to individual, but is usually 20 pounds or more above or below where we are comfortable with ourselves. The "alert-number" doesn't work for addicts.