I read that regular sized chickens are too big to brood quail. They'll probably end up killing these "runts." Smaller silkies, or standard incubator for hatching.
As for whether to raise quail, it sounds like you already raise birds. It might not be as big a leap as it was for me. Quail are the only poultry I've tried (March 2020). It has been more work than I thought it would be, probably because they generally don't free-range. Let them out of the cage, and you'll never see them again.
Quail have "tribes" and roommate preferences. My days are filled with putting the right birds together so they're happy. That's the hardest part.
Also, if you don't intend to process any, just buy mature sexed birds. To maintain harmony and balance, you will need to dispatch a few males. For me, this is why I chose quail (that, and residential areas generally don't let you have more than a few chickens, if any). I knew from the start that I wouldn't be able to kill a chicken. Quail are easy to process with just a kitchen shears and they are tasty. No regrets on raising them, but they are a lot of work.
Also, if it wasn't for 2020 being what 2020 is, I wouldn't be doing this. I'm still too much of a city girl.