Charlie Borland's Stroller Equipments

I am considering selling at these shows, does anyone with experience have an advice?
My best friend is an art broker for local New Orleans artists.
My parents are jewelry designers.
Another good friend makes pop art sculpture.
And I myself am repurpose (taking old or plain objects and making something new and useful out of them) designer.
What do you think would be the best thing to sell?
Do you think this is a worth while endeavor?
I have ten years of marketing experience and most of that was producing traveling events on the road.
So I feel like this might be the perfect way for me to start working for myself while using my experience.
Any feedback is appreciated.