I used to try pretty hard to keep an income coming from our land. I grew veggies for farmers market and sold eggs from the house.
I finally quit everything except what I could give to our local food bank (it is tax deductible) but I have even stopped doing that and have scaled things back to just what we use.
I think anything you grow is better than raising livestock as far as a fast income goes. Unless you raise goats or sheep for wool which are a pretty quick turnover. I have friends who have grown mushrooms for sale at farmers markets and they got a pretty good clientele built up in local restaurants. Any produce you try, its best to start off at a large farmers market. They are great places to meet food brokers if you are growing a specialty crop like mushrooms or herbs. Local chefs are great buyers and if you can get them buying you can be your own broker.
Just something to think about
I even started an echinacea patch but had a hard time finding buyers back then. I think its easier now.