[mad welder 4]

Weld out side, unless its tig. That is what I do.
Welding FCAW in a confined space not as bad as it seems, its worse than you could possibly imagine.

 

[mad welder 4]

I tig weld out side running 12cfm of argon so don't worry about gas coverage, if its windy I will turn it up to 20.
Everything you do or do not do now will catch up to you later on.
The solution to pollution is dilution.