Find an old abandoned house infested with cockroaches. Put a zip lock bag in it with a cracker and you have a time delay infestation. They will lay eggs in and on the cracker. Mail it in a taped up envelope, make sure you smash the cracker, wherever they open it, short of burning it to the ground, you'll be hard pressed to get rid of them yourself. I bought a fifth wheel for the farm, well, it had a cockroach problem. I learned quite a bit about killing them little asshats. Didn't know you needed a growth regulator to effectively kill cockroaches.
Once I figured that out, it was easy peasy.