The best way to up your wealth is with food. If you're using dwarven syrup each single sweet pod produces a stack of 5 ☼20 syrup. If I remember correctly, you can have a stack of 11 sweet pods when having a legendary +5 farmer and fertilize it. This means that you'll have a stack of 55 syrup. Which costs ☼1100. When cooking the dwarves use up to 4 ingredients in a meal. Or 4 stacks of ingredients. So in ideal situations you can have a meal stack of 220 units. Even if all of it is no-quality prepared, it still costs ☼4400. If it's all masterfully minced, it's value is multiplied with 12. So under perfect conditions, you can have a stack of 220 masterfully minced dwarven syrup which cost 220*12*20 or ☼52800. But then again, these are perfect conditions which are near-impossible to achieve.
Actually value of one roast is quality_modifier * 10 + quality_modifier_of_ingredient * value_of ingredient + same_for_other_3_ingredients.
So a single masteful roast made from 4 masterful dwarves syrups is worth:
12 * 10 + 12 * 20 + 12 * 20 + 12 * 20 + 12 * 20 = 12 * 90 = 1080.
And a stack of 220 roasts would be worth 220 * 1080 =
237600☼.
Well this is not practically doable, but with legendary grower you can get quite stable production on sweet pods[6], which can be processed into dwarven syrup[30], so you can make a stack of 120 roasts worth 120 * 1080 =
129600☼.
In practice you can't spam only masterful stuff. A legendary + 5 dwarf makes masterpieces about 30% of the time.
Lets say that one ingredient is masterfully minced and the rest in exceptional.
Value of a single roast would be:
5 * 10 + 5 * 20 + 5 * 20 + 5 * 20 + 12 * 20 = 5 * 70 + 12 * 20 = 350 + 240 = 590.
A stack of 120 roasts would be worth: 120 * 590 =
70800☼.
And this is the final practically feasible result. Still definitely worth it.