I am not the most mechanically inclined individual and yet I managed to build one out of a wine cooler using the tutorials here on the forum. We have eggs on day 45 today and everything is going good.

You can use the cooler method or go on CL and see if you can find a wine cooler that someone is getting rid of cheaply. I picked mine up for $30. You can get heat tape already wired from Reptile Basics. Pick up a computer fan from Best Buy and wire it using an old cell phone charger cord or order an AC fan off Amazon. Here is a picture of mine.



The most important thing is that you use a good thermostat. I am using a Herpstat II but you can get a Herpstat Basic for about $100. As long as you have some time before you need it, I would give building your own a try. Good luck