To quite some extent the definition of 'too much' depends on the players involved.
If you want a daily romance after 5pm, weekends together, etc., and the other dude works very long hours, and really works on weekends, too, you want to move on right away.
Workaholics function well with other workaholics or with immensely tolerant, independent guys who are possibly not that much focused on dating, and see it mostly as a side show. For the rest of the world, the workaholics are in a 'no-go zone', datingwise, that is...
Life in the big cities tends to be an increasingly expensive affair. An average earner with his average working hours may just not cut it. So, quite a few guys are trying to establish themselves beyond the point of living the life in which they make ends meet, and hang in there afterwards.
What makes your position even more difficult is that contemporary careers are nowhere near being balanced, largely speaking. You have a relatively large number of guys mostly working regular hours, and subsiding on their incomes. And you come across much fewer guys who are sweating it big time but are having decent living.
There is hardly anyone left in the middle anymore.