I think that's reasonable for non-mustachians, those who must buy a new car, 3 homes, 14 quilting machines never eat at home, and can't possibly cut back on $150/mo cable bills.
Please excuse the segue:
Even in our current state, which I call "a little too loose with the cash", we don't even GROSS 61k (adjust for USD rate) and we're still putting away a minimum of 10k a year. This will increase rapidly.
My in laws are nearing full retirement. Dad's career ended a few years early due to Parkinson's, and Mom doesn't make a mint or anything. But their house is paid off, they invested well, own 1 car they hardly drive, and everything is going along OK. Mom is freaking out just a bit due to going on a fixed income, but I think they have it planned out really well, and will probably leave us a little something (or maybe even their condo) when it's time for them to leave this world.
My father and I were discussing financial matters over Brunch the other week. I asked him how he'd built up so well. He said to me:
"I didn't save a dime til I was your age (37). I drank, smoked, and otherwise pissed away 3x my income, your college fund, and savings your Mom and I built. But once I got stable, we bought a house, saved a ton, and didn't bother with too much excess. When I retire in 2 years I don't plan on spending half of what I do now. We should be able to leave you and your stepsiblings at least a little something."
So, even if you don't save until you're nearly 40, you can still pull it off. Both sets of parents have done well, but don't have $1m in assets, and they don't seem too worried about it even if they live to 90.