Yes. Get them from the video game tournaments. Ever see some of those kids play Halo?
Yes. Vastly smaller engines and simple economies of scale will bring the costs WAY down.
Not sure but it would be a lot less than a huge friggen manned fighter jet. I doubt it would be 1/20th but it should be considerably less due to the smaller size and reduced weight.
No, they would have to be faster than 200 knots and even then it would still technically be a turkey shoot for 4th gen fighters. However, the turkeys will be shooting back and the 4th gen fighter doesn't even have half the missiles to deal with 20 attackers for every 1 of them. I assume we can make them stealthier due to the vastly reduced size as well. Would YOU risk your 1/4 of a billion dollar jet and extremely highly trained pilots against a fuckton of cheap drones?
I am sure they will. I think I read that the F-22 can even direct fire from nearby drones so perhaps we could use the drones to supplement the abilities and firepower of the F-22 while enabling it to take less risk.