After I wrote the post about having a limited number of high producers in each habitat in order to limit production and enable picking up coins before the limit is reached, I mentioned that each Earth habitat should be limited to only two Panlongs because with three you can reach the $75K limit in just over an hour. Which gave me an idea (that's when I can be very dangerous).
Why not have an A team and a B team? The HC facilitates moving dragons around easily. So, when you're online and checking your park regularly (a lot of the time for me right now) why not move in your Earth A team of three Panlongs. Then, when you are going to check less frequently, pull one Panlong from each habitat, put it in the HC and bring in the lesser producing dragons off the bench?
I have eight earth habitats right now and 18 Panlongs, so with 6 more Panlongs I can do this insane scheme. And if I take them to level 15 it greatly helps my gold shrine efforts. Then once I have the gold shrines I can sell excess Panlongs for $1M each. I'm gonna do it. Makes the game that much more fun - I'm a dragon coach! Worth the bit of money.