So this is a high round tutorial on town survival for solo. So i managed to get round 30 with this, the only reason i died was i got bored.
So what you need to do is go town the bar and then run to the juggernaught while killing zombies on the way. This is very easier and u are less likely to die than using a **** train as u are less likely to get trapped. The only way you could die is if you get swarmed on the stairs on u try to get powerups.
Let me know if this worked for you.,