I believe taking a part-time job to save some money for your business is always a great idea. I know some people that have done worked part-time, sold old collectibles (like baseball cards, etc) just to start saving for their business venture.
I definitely think this should be a good idea for you. While you are doing that, think of the processes you go through each day to complete the tasks for farming. What has to happen, in what way does it happen and how do you get to the end result.
Then apply those thoughts to the business you’re creating. How will you start, what are the processes, how do you get things done, and what’s the end result. This is just to get you started.