Depends on your farm size and location
Example I can make 100 gold per 10 hours doing nothing and while lvling carpentry
In mahadavi planting Travelers Tree since the climate cuts the time by 4 hours xD
Also owning 12 farms help lol
13gold for 120 trees = 650+ logs = 2 stacks lumber+ = 21gold a stack of lumber per 10 hours
Of course theres other options but this is the lazy way for me set it and forget it