99 z3 2.8l roadster

[Sijray21]

Personally Id probably do all the prep work myself, then take it to a local welder to have it welded up for (guessing) under $200.

I did think about that, but the issue I'll have is that to do much of the prep requires the removal of the diff and rear sub frame immobilizing the car. I would need to do that in their shop or get the welder to come to me, right? I can't even get it to be a rolling chassis to tow back and forth. Is a mobile welder a thing?