100k, no question. That's an exceptional amount of money for the average single person and 40hrs would allow time to actually do things with your life and money. And have energy and motivation to do them.
If you're really desperate for that extra cash, set aside part of your salary for smart investing and a few years down the line you'll be making even more for the same hours a week.
Again, depends where you live. In many expensive urban areas $100k isnt exceptional.