A laminaire flow hood is not a rocket science. 2 micron hepafilter and carbon filter, 2x 12V pc cooloing fans, 12V speed regulating adapter and a plastic box is all you need. Particles counter, box, hepa and carbon filters are from IKEA. Adapter and fans are from Aliexpress.
It is not for professional use and doesn't have to be more than that. Yes, it can be much easier and cheaper than you can imagine. Reconstituting your vials and filling cartridges in front of it gives you some peace of mind at least. You must use it at an environment free of external air flow and pets. Also sanitise all material you use by spraying them with %70 isopropyl alcohol through an atomiser. %70 is more efficient than %100 because of evoporating speed.
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