"He who marches out of step hears another drum." ~ Ken Kesey
The ink cost is nothing when you compare it to the cost of labor. That's where the real bucks is being spent, pretreatment time, very very long print times on dark cure times for both pretreatment and print. What that adds up to is a couple decent shirts a half hour if you are lucky. And yes the manus will blow smoke up your arse when it comes to ink costs and most definetely when it comes to printing times.
We actually have a NeoFlex, quite happy with it also. A HUGE selling feature of thedebut NeoFlex for us was the fact that you can load 3 items. When one is done you can take it off set another one up and place it back on the board. We also run a dual head air driven heat transfer machine, and a Viper pretreat machine. If you setup the timing just right you can run a pretty nice production line! I could of never justified a single platen DTG. Also a pretreat machine makes a large difference.