
Hatching is a little addictive, isn't it? I hatched a small batch from my own eggs last month, planning on it being the only batch I would do this Fall but after watching them hatch and enjoying the chicks so much, I'm now on day 14 of batch two. This is definitely the last batch I'm incubating this year though. I'm pretty sure. Well, I think so....
For cleaning, a lot of people recommend Oxine, which has to be purchased online but you get a gallon of concentrate so it goes a long way. Otherwise you could use a weak bleach solution.
Are you feeding medicated chick starter? That will help to prevent coccidiosis, at least.
As for finding homes for them, I would try Craigslist. There is also a Facebook swap page for Kansans and you will find the link for that in signatures on the Consolidated Kansas thread. I'm not much of a Facebook user so I don't have the link myself. It will definitely help to have a system for identifying them by age etc. Perhaps each batch that you incubate, could be marked with a different color of zip tie around one leg? (Just be careful not to put them on too tight and to keep an eye on them so that as they grow you can replace the zip tie with a larger size as needed.) That way you can keep records fairly simple with the zip tie color and hatch date and age them that way. If you are selling, people will want to know their age so they know when to expect eggs.
You might want to consider slowing down on hatching now that it is Fall. Many people don't want to raise chicks over the winter due to the higher cost of feeding them then (less forage available) so you might have a harder time finding people who want to buy them.
Are you suggesting you need to change roosters because he is related to the chicks? If so, you don't need to worry for a few generations. While breeding unrelated pairs is favored, breeding father to daughter and mother to son is acceptable in the chicken world, particularly if you are not breeding show-quality birds. It sounds like you are breeding either one breed or "barnyard mixes" and producing chicks just to be egg-layers and in that situation, breeding father to daughter, at least for a few generations, won't be an issue.
Hope that answers some of your questions but feel free to ask more....