​what activities can i setup at fairs or other kinds of events that could benefit from my half acre of farmland?

i wanted to set up something easy to manage at fairs, festivals or other kinds of events, but id like it to be decently easy to manage, i was also wondering if there was something other than a food truck that could benefit from my half acre of farmland which most of it is currently empty cause i need to decide the crops and there is a small olive grove where i will put a bit of blueberry plants

i can spare up to 10k euros, i have a bit of it skills, no preferences or experience