Chassis dolly/casters?

I've gottten alot of ideas from guys already. much appreciated. I'm goin to be making the Car dolly within the next few weeks now though. so time to pick a plan. since I was last on here, I got a brand new miller welder. So if I decide to do something with metal, it should be a breeze to weld together!

just seeing if anyone has more ideas or pictures of car dollys that they have made. thanks guys!