Well. I do not weld. Nor do I know anyone who does.
My birds DO free range year around (I even raise my meat birds free ranging) and I have LGDs to keep them safe from predators (and birds don't respect a 3 wire electric fence, FYI, but they tend to stay at home), but I move the coop as part of a nutrient management plan for my pastures. Where this coop went this summer -- I raise meat birds in it during the summer -- the grass is amazing, even in the winter. I don't like the buildup of stool, so I move it, the stools are broken down, and the grass comes back fast and thick. I'm very happy with my system and I hate my stationary coops. The ground around them is scratched bare, there are loads of feathers and wood chips around them that I'm always cleaning up, and I don't like the appearance. I DLM the stationary coops, so at least I get compost out of them, but I really wish I had a dozen of these hoop coops marching across my pastures. I'd never need to buy fertilizer!
However, what we came up with works. I was awakened by our NOAA radio going crazy last night, and we had a terrible storm come through. It blew over a very large and very metal gazebo (i had taken the cover off, but the frame still was thrown around), picked up and threw a huge empty water trough, and threw around a half full compost bin...but the coop in question did not move. The stationary coop that was tipped in the same storm that threw the hoop coop around was also fine.
So, unless we have a tornado or hurricane, we just might be OK. Thanks for the ideas though.