I bought a cheap incubator (ergh), tweaked it with a fan (yay) and spent a total $80. Results were excellent after adding the fan. Would never recommend buying a still air incubator alone, even if cheap. However, I agree with
@Quail 66 that incubation might be the way to go for both $ and chick safety.
Here's my post on tweaking the cheap incubator.
https://www.backyardchickens.com/ar...le-giant-still-air-incubator-9300-hack.76242/
Local purchases are also good. Check your area and check Craigslist too.