The fact that your farm is already producing palm wine is great news. However, you can do more than just sell the wine. Depending on your area, you may be able to show people how you make it. This would be geared more toward tourists. If you're in a region that has tourists, make inquiries at hotels.
You have 6 acres and that is a good size. You can experiment with other crops to expand your income level.
Look at other farms in your area to assess how they are earning. It's always easier to step into an existing market than create a new one.
By doing that, you will know there is a demand for whatever you will be doing in addition to your palm wine.
Also, I would suggest looking further afield on the internet for 'untapped markets' in your area. It has to be simple, though. If you plan to export a product, there will be red tape. There may be government agencies that can help you but the benefit has to outweigh the time you'll spend.
Start by writing articles about your business, and other local businesses in your area. By doing this you are surrounding yourself with people who are in a position to help push your business (and I am not just referring to your wine) to a new level.
In farming, it is easy to think that the money is to be made from the land but that isn't' the case.
In this article there are other avenues to try, that can bring in extra money. You've heard the phrase, "think outside the box", well you also have to "think outside the farm".
Consider making videos about rural life and putting them on YouTube or other similar video sites.
These are just a few ideas but once you begin brainstorming ideas with friends and families you'll be amazed at what you can do. Start small and keep going.