And you know where this is going, another of these questions. I have built a lot of stuff for my BPs recently, but I am not sure I am totally comfortable building an incubator, and if I am going to have any time for it I need to do it soon. I have the herpstat thermostat with two outlets so I have one dedicated to my rack and one dedicated to my incubator, so no issues there. Here are just a few of my questions about what I will need if I make one of what to look for if I buy one:

Do I need a separate internal thermometer? I have a handheld one I can use to check if need be, but the probe from the herpstat shows me the temp anyway. I don't think I need this, but I don't know.

A humidity guage. Should I just go with that accurate one in the sticky? Are there any other inexpensive options?

I am going to have at least 3 females of sufficient size come this season, maybe 5, so how big of one do I need? I really have no concept of space when it comes to this, there are so many variations. If I get an old fridge that probably won't be an issue, but I can't really stick one of those in my room (where my snakes are thermostat is). I also hope to expand, so maybe going big and using extension cords if I need it to be in another room would work.

I guess my main hang up is in the huge mark up. I can get an old fridge off craigslist for less than $50, I probably already have enough flexwat hanging around, and even if I have to buy it would still only be like 25 tops, then a few odds and ends like the accurite humidity / thermometer for $15 et cetera. Which would make me a huge one for around $100 or I can pay $200 for one less than half the size.

Also, is it possible to put a window in an old fridge incubator? The only guide on it I've seen is this: http://www.arbreptiles.com/cages/incubator.shtml
and he doesn't mention it. I don't really have a desire to peek in on my eggs, but if its something that is actually useful (like checking for denting without risking the slight temp/humidity change that occurs when you open the door) then I guess I'd like one.