You should post on the hatching thread about incubators. I got a Hovabator 2362 online. By the time I had it shipped and bought a hygrometer/thermometer to go with it I was into it almost $100. There are less expensive incubators that probably work exactly the same. The Hovabator I bought is a pretty cheaply constructed styrofoam box with a heating element and semi-effective fan. If you are at all mechanically inclined you could probably build a way nicer incubator for a lot less money. In any event, I don't have a lot of free time for building things so I bought one. Once I got the temp regulated I put in 35 eggs from my hens. Seven were infertile, and all 8 of the legbar eggs died for whatever reason. Of the 20 eggs that made it past day 8, all 20 hatched. I didn't get the egg turner, so I turned them by hand. The incubator worked better than I expected based on the reviews I read online. I think the failure/success of using it has a lot to do with user error and not the incubator itself. I did find temperature inconsistencies on different sides of the incubator. If you move your eggs around to different places, this shouldn't be an issue.
As for hatching in the winter, it just depends on how many backup resources you have in case the power goes out. My incubator cooled off to 70 degrees within 1 hour of unplugging it, so they are not well insulated and lose heat quickly. The eggs can cool off for a short period of time and be fine (maybe 12 hours or less) and still hatch. You do need a back up plan or two. We have a generator,but it costs about $20 in fuel to run it for 12 hours. If the power was out for days, it wouldn't be cost effective to keep it going all night just for the incubator. We have a wood stove, but I don't know if there is a way to get it to heat the incubator consistently. You could put hot water bottles in the incubator to try to keep the eggs at 99 degrees. All my neighbors/friends were without power too, so that wasn't an option. My mother lives in the city about an hour away and had power, so I could have taken the incubator to her house. Keeping the humidity correct and turning the eggs would probably be too much for her to manage though. In the end, I am so thankful the power went out after hatching than before. Sustaining the chicks with no power was way easier than trying to manage fragile eggs in an incubator.
I think I've seen some used incubators in your area for sale on Craigslist. You might want to check on there and save a little money while deciding what works best for you.