It may be possible for high pressure aeroponics to be included in the base version. A 5.5 bar (100 psi) pump, with 6x 0.6mm brass nozzles should ensure efficient irrigation.
Ideal sensing equipment would include a pH and EC meter rated for continuous immersion. This parts will be optional.
Humidity measurements are essential for detecting pump failure. Water temperature sensors in the reservoir, along with a level sensor(capacitive / sonar) are also mandatory.
Water cooling, at a reasonable cost remains a major hurdle.