If you want money fast it would be usefull withs corps are best for money age day:

195 coins / 1 day / lv 18 / veggies*
320 coins / 1 day / lv 20 / fruit
480 coins / 1 day / lv 22 / veggies*
210 coins / 1 day / lv 25 / veggies
??? coins / 1 day / lv 27 / fruits
155 coins / 1 day / lv 30 / veggies