Best for the money, would probably be a Hovabator. But I'm gona tell you about a differnet one...........
I wish I had a hova, but I have an LG. The LG isn't that bad........you'l read a lot of people saying they hate it so bad, and some people say that the only used it once, and sold it after word. Well....if you only used it once, you obviously wont get that good of a hatch. It takes a couple tries, but The worst hatch rate I got from my LG was 50%, and that's not really that bad. By the 4th time I used it, got a 75% hatch, so you just really have to use it a couple times, to get to know how it works.
My LG was like $50 and the egg turner was another $50 so it all added up to around a 100 bucks, probably the cheapest to buy, and one of the cheapest in quality lol. But it works just fine. The temp and humidity will be waaay more stable if you have it in some kind of cupboard or big empty drawer, or any place where there isn't much change in the enviornment around it.