Thanks a lot for the comments,
There is not a lot more we can do to lower the price of this unit without compromising the quality of a any of the components, the intention wasn't to do an extractor spending as little as possible to end up with a cheapo as there are already a few out there, those might do for the people who touch a soldering iron once a month if so but for more regular users those solutions aren't very practical even if they have one of these
http://gsmserver.com/shop/equipment/soldering_sssembly/ancillary_equipment/pcb_holder_proskit_sn_394.php . As an example, just the filters we use cost 6 to 7 times more than other alternatives but we didn't think would be worth to deliver something that we don't really know what it is or isn't certified at all.
Something we are contemplating is working on other versions with a single fan, or 2, as well as the current which has 4. That would definitively bring the cost down, the fans aren't cheap either, much easier to ship, and so on; but obviously will decrease the coverage/range accordingly. What would you think about that?
We are pretty reluctant to come up with more of the same, and therefore would like to keep the selection of componets that we have in general terms (maybe could offer a plywood version). We are aware that we are targeting a semi professional group and possibly there aren't as many as occasional users who might not even need one, what we are trying to understand at this stage is: are we in the right direction for those who solder more regularly or there is something fundamental we are missing?
We are not sure if this is the right way to expose it, but unfortunately we need a crowdfunding platform to make this product, if you think it's far too pricey as it is you don't want to know the price for making a few tens of them only.