there is absolutely a micro business in these phenomenal ideas! I just laid the gauntlet down to my father in law to emulate your designs, he is a good engineer but i am not sure that good! Patent your designs and do some research into the manufacturing expenses to see if it is worth marketing them. I know i would comfortably pay $50 - $75 for the watering system. I think i have my feeder situation sorted, but i am in Northern CA, an automatic waterer when it is 100 degrees is almost a must!
As for the door, i have been trying to work something out for a while, if my chickens were this automated, i can leave for the weekend without any concerns!