I'm on a roll, as here comes yet again an update!
This week we achieved a start of a rotisserie (for the frame work), installed an exhaust fan and shop computer, made a holster for the welding gun and generally "dicked" around in the garage.
So we drilled a 100 mm hole in the wall, stuck a pipe
through it and mounted a fan to it. Might have to add some ducting to it as to gather the fumes more efficiently.