Also forgot to mention that the blue filter in the rear of the spray booth is easily and cheaply replaced.Thanks for the replies. I did go down the rabbit hole of reading everything I could and you end up with people slating the portable hobby units as insufficient but it gets too much into laquers and enamel with I will never use.
Extraction is a must due to my son's respiratory health. The best bet will be a folding table near a window in our bedroom with one of those booths.
This is the stuff that I use.

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Not played in a few weeks, I wanted to get my Vashtor etc ready but I've had zero motivation really for painting etc. Vashtor is coming along ok. I don't really have enough daemon engines though to make use of that stratagem and I'm not buying more stuff until I finish what I have, too much partially done stuff even if there's no pile of boxed shame.