After a long time with Jli, FR0ST, and ShadowyWhisper, I came up with the gold per sec on the Mines.
Key:
xa = Row one, shorter mine
xb = Row one, longer mine
ya = Row two, shorter mine
yb = Row two, longer mine
3.40909090 per second xa, 3.125 gold gold per second xb, 2.0833333 gold per second ya, 1.973 gold per second yb
This should come in handy when crafting strategies. If it's correct, thank ShadowyWhisper. If it's wrong, blame Jli (he gave measurements, ShadowyWhisper did the math.)
I hope this helps.