I've got a commercial account with a HUGE number of islands in the parking lot. Each island is about 4 to 6 feet wide by 30' long. Also, each island has at least 1 tree panted which makes it immposible to take a 36" WB up there. I'm currently using a 21" push mower. Besides using a string trimmer, any suggestions about how to mow these suckers? It's eating up the clock!