Nathan Duszynski, 13, decided he wanted a hot dog cart, so he could earn some money (to help his disabled parents). But as he was setting up shop Tuesday in the parking lot of Reliable Sports at River Avenue and 11th Street — across the street from Holland City Hall — a city of Holland zoning official shut him down. Now, after spending more than $2,500 to start up his business, Duszynski is throwing in the towel, his mom said.