I have a bs in computer science. Manage an environment of about 2500 computers. But it really depends on the complexity as stated. I also handle the VMware farm of about 250 servers. All the backups (vm level and file level) and all the patching.
The enterprise tools that exist today make it so there isn't much difference in management time between 100 computers and 2000. It's the same number of clicks to push software / security patches. The time is consumed by supporting them physically (ie imaging new ones, swapping out a mouse, etc) which as. Sys admin you don't do too much of. You have a team of people below you to handle that.
All that being said, I personally make a little over 60k. That's in Utah.