I'm not the greatest at reading code or math so hopefully someone can test this out and see how accurate these numbers are.
I will be using 1,000 acres for all examples. Also I did not include any racial income bonuses.
Tax rates below 20 give a bonus to peasants allowed to live on the land and tax rates above 40 give a penalty.
First a 2:1 ratio with 39% tax rate
2:1 ratio with 65% tax rate660 markets to 330 tents.
15,761 peasants
$42 PCI
$258,165 from taxes
$330,000 from markets
$588,165 total cash earned per turn
1:1 ratio with 39% tax rate660 markets to 330 tents
12,243 peasants
$42 PCI
$334,233 from taxes
$330,000 from markets
$664,233 total cash earned per turn
1:1 ratio with 65% tax rate500 markets to 500 tents
23,134 peasants
$38 PCI
$342,846 from taxes
$250,000 from markets
$592,846 total cash earned per turn
1:2 ratio with 39% tax rate500 markets to 500 tents
17,971 peasants
$38 PCI
$443,884 from taxes
$250,000 from markets
$693,884 total cash earned per turn
1:2 ratio with 65% tax rate330 markets to 660 tents
30,045 peasants
$33 PCI
$386,679 from taxes
$165,000 from markets
$551,679 total cash earned per turn
100% tents with 65% tax rate330 markets to 660 tents
23,339 peasants
$33 PCI
$500,622 from taxes
$165,000 from markets
$665,622 total cash earned per turn
100% markets with 65% tax rate1,000 tents
34,783 peasants
$25 PCI
$565,224 from taxes
$0 from markets
$565,224 total cash earned per turn
1:3 ratio with 65% tax rate1,000 markets
1,159 peasants
$50 PCI
$37,668 from taxes
$500,000 from markets
$ 537,668 total cash earned per turn
Basically 1:1 appears to be about the best.250 markets and 750 huts
26,377 peasants
$31 PCI
$531,496 cash from taxes
$125,000 cash from markets
$656,496 total cash earned per turn