I built mine from a Upright freezer, Flexwatt and a Helix DBS-1000.
If I didnt have a bunch of Eggs, I might have considered a Hovabator.....they can work if set up properly, but they are small, and work better in a room with stable temperatures. My freezer Incubator Probably cost 200$ because of the Helix to make and takes up more space.....so basically it depends on YOUR needs...on what you buy.

Either way Betta I wish you luck