I don`t mean to doubt you I just suggest you consider brooding, just in case the momma hen tries to lead them back to your neighbors or just leave period. Chicks need to be kept really warm so you`ll want to have the coop or brooder(whichever you choose) ready to go by the time they`re hatched...
Are you planning on incubating and brooding or letting nature take it's course? What about feed, home-made or store bought? It's a big leap to raising chickens, but so worth it.