I found a decent way to make money yesterday, but the problem is it absolutely destroyed all my free labor. It was netting about 10-12 gold per maybe 500 labor. That's actually probably a very solid return on labor, but I haven't rolled any alts yet to use worker's comp potions on yet. I'm working on that tonight so that I can get more money before this dries up.
Although, that said, the worker's comp potions will eat up 2.5g or so per, so that brings me down to 7.5-9.5 gold net. And that's assuming they haven't gone up recently, or that everything else remains stagnant.