[DaniFong]

We already breed dustmites; just by accident. The incubators are homes, the climate controlled by the choice of laundry detergent and thermostat. This wouldn't be much different. A starting point is just measuring the allergen content of the particulates.

In any of these projects the dominant cost is salaries, which are not so high if you hire great young people who care about it. It only seems impossible to those with a lack of imagination.

As for selling them, here a market for you: ecologists with asthma. These probably number in the low ten thousands, they probably spend close to a thousand dollars a year in medication, and four years in lifetime. That's hundreds of millions in that market category alone.